diff --git a/src/contracts/core/DelegationManager.sol b/src/contracts/core/DelegationManager.sol
index b719d0bf3..68b8c0c8e 100644
--- a/src/contracts/core/DelegationManager.sol
+++ b/src/contracts/core/DelegationManager.sol
@@ -516,8 +516,8 @@ contract DelegationManager is
                 operator: operator, 
                 staker: staker, 
                 strategy: strategies[i],
-                existingShares: Shares(0),
-                addedOwnedShares: ownedShares[i],
+                existingShares: Shares.wrap(0),
+                addedShares: ownedShares[i].unwrap().wrapShares(),
                 totalMagnitude: totalMagnitudes[i]
             });
         }
@@ -745,14 +745,13 @@ contract DelegationManager is
         Shares existingShares,
         Shares addedShares
     ) internal returns (uint256 newDepositScalingFactor) {
-        uint256 newDepositScalingFactor;
         if (existingShares.isZero()) {
             newDepositScalingFactor = WAD / totalMagnitude;
         } else {
-            newDepositScalingFactor = existingShares.calculateNewScalingFactor(
-                addedShares: addedShares,
-                oldStakerScalingFactor: depositScalingFactors[staker][strategy],
-                totalMagnitude: totalMagnitude
+            newDepositScalingFactor = existingShares.calculateNewDepositScalingFactor(
+                addedShares,
+                depositScalingFactors[staker][strategy],
+                totalMagnitude
             );
         }
 
@@ -866,8 +865,8 @@ contract DelegationManager is
                 
                 // forgefmt: disable-next-item
                 ownedShares[i] = shares.toOwnedShares(
-                    stakerScalingFactor: depositScalingFactors[staker][strategies[i]],
-                    operatorMagnitude: totalMagnitude
+                    depositScalingFactors[staker][strategies[i]],
+                    totalMagnitude
                 );
             }
         }
diff --git a/src/contracts/core/StrategyManager.sol b/src/contracts/core/StrategyManager.sol
index bd3dd7ed4..a0fcb5dde 100644
--- a/src/contracts/core/StrategyManager.sol
+++ b/src/contracts/core/StrategyManager.sol
@@ -171,7 +171,8 @@ contract StrategyManager is
         IERC20 token,
         OwnedShares ownedShares
     ) external onlyDelegationManager {
-        _addOwnedShares(staker, token, strategy, ownedShares);
+        //TODO: fix
+        // _addShares(staker, token, strategy, ownedShares);
     }
 
     /// @notice Used by the DelegationManager to convert withdrawn shares to tokens and send them to a recipient
@@ -238,7 +239,7 @@ contract StrategyManager is
      * @param staker The address to add shares to
      * @param token The token that is being deposited (used for indexing)
      * @param strategy The Strategy in which the `staker` is receiving shares
-     * @param shares The amount of shares to grant to the `staker`
+     * @param sharesToAdd The amount of shares to grant to the `staker`
      * @dev In particular, this function calls `delegation.increaseDelegatedShares(staker, strategy, shares)` to ensure that all
      * delegated shares are tracked, increases the stored share amount in `stakerStrategyShares[staker][strategy]`, and adds `strategy`
      * to the `staker`'s list of strategies, if it is not in the list already.
@@ -293,7 +294,7 @@ contract StrategyManager is
         uint256 depositedShares = strategy.deposit(token, amount);
 
         // add the returned shares to the staker's existing shares for this strategy
-        _addShares(staker, token, strategy, depositedShares);
+        _addShares(staker, token, strategy, depositedShares.wrapShares());
 
         return depositedShares.wrapShares();
     }
diff --git a/src/contracts/interfaces/IDelegationManager.sol b/src/contracts/interfaces/IDelegationManager.sol
index 189acb111..4ee8390aa 100644
--- a/src/contracts/interfaces/IDelegationManager.sol
+++ b/src/contracts/interfaces/IDelegationManager.sol
@@ -348,7 +348,7 @@ interface IDelegationManager is ISignatureUtils {
      * @param strategy The strategy in which to increase the delegated shares.
      * @param existingShares The number of deposit shares the staker already has in the strategy. This is the shares amount stored in the
      * StrategyManager/EigenPodManager for the staker's shares.
-     * @param addedOwnedShares The number of shares to added to the staker's shares in the strategy. This amount will be scaled prior to adding
+     * @param addedShares The number of shares to added to the staker's shares in the strategy. This amount will be scaled prior to adding
      * to the operator's scaled shares.
      *
      * @dev *If the staker is actively delegated*, then increases the `staker`'s delegated scaled shares in `strategy`.
@@ -359,7 +359,7 @@ interface IDelegationManager is ISignatureUtils {
         address staker,
         IStrategy strategy,
         Shares existingShares,
-        OwnedShares addedOwnedShares
+        Shares addedShares
     ) external;
 
     /**
diff --git a/src/contracts/interfaces/IStrategyManager.sol b/src/contracts/interfaces/IStrategyManager.sol
index c0967d9b4..29289688d 100644
--- a/src/contracts/interfaces/IStrategyManager.sol
+++ b/src/contracts/interfaces/IStrategyManager.sol
@@ -42,7 +42,7 @@ interface IStrategyManager is IShareManager {
      * @param token Is the token that `staker` deposited.
      * @param shares Is the number of new shares `staker` has been granted in `strategy`.
      */
-    event Deposit(address staker, IERC20 token, IStrategy strategy, OwnedShares shares);
+    event Deposit(address staker, IERC20 token, IStrategy strategy, Shares shares);
 
     /// @notice Emitted when the `strategyWhitelister` is changed
     event StrategyWhitelisterChanged(address previousAddress, address newAddress);
@@ -65,7 +65,7 @@ interface IStrategyManager is IShareManager {
      * WARNING: Depositing tokens that allow reentrancy (eg. ERC-777) into a strategy is not recommended.  This can lead to attack vectors
      *          where the token balance and corresponding strategy shares are not in sync upon reentrancy.
      */
-    function depositIntoStrategy(IStrategy strategy, IERC20 token, uint256 amount) external returns (OwnedShares shares);
+    function depositIntoStrategy(IStrategy strategy, IERC20 token, uint256 amount) external returns (Shares shares);
 
     /**
      * @notice Used for depositing an asset into the specified strategy with the resultant shares credited to `staker`,
@@ -94,7 +94,7 @@ interface IStrategyManager is IShareManager {
         address staker,
         uint256 expiry,
         bytes memory signature
-    ) external returns (OwnedShares shares);
+    ) external returns (Shares shares);
 
     /**
      * @notice Get all details on the staker's deposits and corresponding shares
diff --git a/src/contracts/libraries/SlashingLib.sol b/src/contracts/libraries/SlashingLib.sol
index 78605b196..76478f380 100644
--- a/src/contracts/libraries/SlashingLib.sol
+++ b/src/contracts/libraries/SlashingLib.sol
@@ -99,8 +99,8 @@ library SlashingLib {
 
     function toOwnedShares(
         Shares shares,
-        uint64 stakerScalingFactor,
-        uint64 operatorMagnitude
+        uint256 stakerScalingFactor,
+        uint256 operatorMagnitude
     ) internal pure returns (OwnedShares) {
         /**
          * ownedShares = shares * stakerScalingFactor * operatorMagnitude
@@ -118,9 +118,9 @@ library SlashingLib {
     function calculateNewDepositScalingFactor(
         Shares currentShares,
         Shares addedShares,
-        uint64 stakerScalingFactor,
-        uint64 operatorMagnitude
-    ) internal pure returns (uint64) {
+        uint256 stakerScalingFactor,
+        uint256 operatorMagnitude
+    ) internal pure returns (uint256) {
         /**
          * Base Equations:
          * (1) newShares = currentShares + addedShares
@@ -145,10 +145,10 @@ library SlashingLib {
          */
 
         // Step 1: Calculate Numerator
-        OwnedShares currentOwnedShares = currentShares.toOwnedShares(stakerScalingFactor, operatorMagnitude);
+        uint256 currentOwnedShares = currentShares.toOwnedShares(stakerScalingFactor, operatorMagnitude).unwrap();
 
         // Step 2: Compute currentShares + addedShares
-        uint256 ownedPlusAddedShares = currentOwnedShares.add(addedShares).unwrap();
+        uint256 ownedPlusAddedShares = currentOwnedShares + addedShares.unwrap();
 
         // Step 3: Calculate newStakerScalingFactor
         // Note: We divide by operatorMagnitude to preserve 
@@ -156,7 +156,7 @@ library SlashingLib {
         //TODO: figure out if we only need to do one divWad here
         uint256 newStakerScalingFactor = 
             ownedPlusAddedShares
-            .divWad(currentShares.unwrap() + addedOwnedShares.unwrap())
+            .divWad(currentShares.unwrap() + addedShares.unwrap())
             .divWad(operatorMagnitude);
 
         return newStakerScalingFactor;
@@ -168,6 +168,10 @@ library SlashingLib {
         return x.unwrap() + y;
     }
 
+    function add(Shares x, Shares y) internal pure returns (Shares) {
+        return (x.unwrap() + y.unwrap()).wrapShares();
+    }
+
     function add(DelegatedShares x, uint256 y) internal pure returns (uint256) {
         return x.unwrap() + y;
     }
@@ -188,6 +192,10 @@ library SlashingLib {
         return x.unwrap() - y;
     }
 
+    function sub(Shares x, Shares y) internal pure returns (Shares) {
+        return (x.unwrap() - y.unwrap()).wrapShares();
+    }
+
     function sub(DelegatedShares x, uint256 y) internal pure returns (uint256) {
         return x.unwrap() - y;
     }
@@ -216,6 +224,10 @@ library SlashingLib {
         return x.unwrap() == 0;
     }
 
+    function isZero(OwnedShares x) internal pure returns (bool) {
+        return x.unwrap() == 0;
+    }
+
     function lte(Shares x, Shares y) internal pure returns (bool) {
         return x.unwrap() <= y.unwrap();
     }