open WillowTree
go to WillowTree and not Weapons Workshop
Find your weapon/class mod/shield/grenade mod
change the quality of it to 4128773
then hit save
1) open your save using willowtree beta 10r1 or above
2) go to the weapons tab and find the gun you want to make lvl 61
3) copy it to clipboard
4) change to the DLC backpack
5) make a new gun and import from clipboard
6) slide quality to max and ITEMGRADE LEVEL to 63
7) save and enjoy a sexy new LVL 61 item/weapon