diff --git a/src/Mailbomb.sol b/src/Mailbomb.sol
index 3047d42..e0ab757 100644
--- a/src/Mailbomb.sol
+++ b/src/Mailbomb.sol
@@ -13,20 +13,7 @@ chaos ensues until 1000 survivors - the game stops
 import {ERC721} from "solmate/tokens/ERC721.sol";
 import {Owned} from "solmate/auth/Owned.sol";
 import {LibString} from "solmate/utils/LibString.sol";
-import {Unaboomer} from "./Unaboomer.sol";
-
-error NotEnoughEther();
-error NotOwnerOfToken();
-error MaxSupplyReached();
-error TooMany();
-error NoContract();
-error WrongEtherAmount();
-error MaxAmountReached();
-error NoAdmins();
-error NotAdmin();
-error NoRemoveSelf();
-error NoRemoveDeployer();
-error NotEnoughBombs();
+import {UnaboomerCommon} from "./UnaboomerCommon.sol";
 
 contract Mailbomb is ERC721, Owned {
     using LibString for uint256;
@@ -67,11 +54,17 @@ contract Mailbomb is ERC721, Owned {
         unchecked {
             for (uint256 i; i < _amount; i++) {
                 minted++;
-                _mint(to, minted);
+                _mint(_to, minted);
             }
         }
     }
 
+    /// Burn spent tokens from main contract
+    function burn(uint256 tokenId) external {
+        require(msg.sender == address(main), "invalid minter");
+        super._burn(tokenId);
+    }
+
     function totalSupply() public view returns (uint256 supply) {
         return minted;
     }
diff --git a/src/Unaboomer.sol b/src/Unaboomer.sol
index c8548a8..de23585 100644
--- a/src/Unaboomer.sol
+++ b/src/Unaboomer.sol
@@ -64,7 +64,7 @@ contract Unaboomer is ERC721, Owned {
         unchecked {
             for (uint256 i; i < _amount; i++) {
                 minted++;
-                _mint(to, minted);
+                _mint(_to, minted);
             }
         }
     }
diff --git a/src/UnaboomerCommon.sol b/src/UnaboomerCommon.sol
index 811583b..1b143bd 100644
--- a/src/UnaboomerCommon.sol
+++ b/src/UnaboomerCommon.sol
@@ -52,8 +52,8 @@ contract UnaboomerCommon is Owned {
     }
 
     /// Set contract address for Mailbomb tokens
-    function setUnaboomerContract(address _address) external onlyOwner {
-        mailbomb = Unaboomer(_address);
+    function setMailbombContract(address _address) external onlyOwner {
+        mailbomb = Mailbomb(_address);
     }
 
     // =========================================================================
@@ -94,14 +94,10 @@ contract UnaboomerCommon is Owned {
         for (uint256 i; i < tokenIds.length; i++) {
             require(mailbomb.ownerOf(tokenIds[i]) == msg.sender, "token not owned");
             uint256 randomBoomer = uint256(keccak256(abi.encodePacked(tokenIds[i], block.timestamp, msg.sender))) % boomerSupply;
-            mailbomb._burn(tokenIds[i]);
+            mailbomb.burn(tokenIds[i]);
             bool _res = killBoomer(randomBoomer);
             res[i] = _res;
         }
         return res;
     }
-
-    function supportsInterface(bytes4 interfaceId) public view virtual override (ERC721) returns (bool) {
-        return super.supportsInterface(interfaceId);
-    }
 }
\ No newline at end of file
diff --git a/test/Unaboomer.t.sol b/test/Unaboomer.t.sol
index 717e183..f2c87cb 100644
--- a/test/Unaboomer.t.sol
+++ b/test/Unaboomer.t.sol
@@ -2,28 +2,34 @@
 pragma solidity ^0.8.13;
 
 import "forge-std/Test.sol";
+import {UnaboomerCommon} from "../src/UnaboomerCommon.sol";
 import {Unaboomer} from "../src/Unaboomer.sol";
 import {Mailbomb} from "../src/Mailbomb.sol";
 
 contract UnaboomerTest is Test {
+    UnaboomerCommon public main;
     Unaboomer public boomr;
     Mailbomb public bomb;
 
     function setUp() public {
+        main = new UnaboomerCommon();
         boomr = new Unaboomer();
         bomb = new Mailbomb();
-        bomb.setUnaboomerContract(address(boomr));
+        boomr.setMainContract(address(main));
+        bomb.setMainContract(address(main));
+        main.setUnaboomerContract(address(boomr));
+        main.setMailbombContract(address(bomb));
     }
 
     function testWithdraws() public {
-        vm.deal(address(boomr), 11 ether);
-        vm.prank(address(boomr.owner()));
-        boomr.withdraw();
+        vm.deal(address(main), 10 ether);
+        vm.prank(address(main.owner()));
+        main.withdraw();
     }
 
     function testMint() public {
         hoax(address(1));
-        boomr.mint{value: 0.05 ether}(5);
+        main.radicalizeBoomer{value: 0.05 ether}(5);
         assertEq(boomr.totalSupply(), 5);
         assertEq(boomr.tokenDead(1), false);
     }