This is very simple and I am sure it is known. First, this only works for the Four Guns you have equipped. I suggest picking your favorite 4 guns for the character your are going to modify. Open up your Game Save in WillowTree. Go to the Weapons tab, the top 4 should be your equipped guns, if not just search and find where they are. Click Options, Level Quality/Editing Mode..Use Numeric Box (decimal) Your 69 weapons should read 71 in the level slot. Change that on each equipped gun to 83. Make sure to Save Changes for each individual one before saving the whole save. That's it, your 4 equipped guns will be level 81's instead of 69, giving them better damage and stats. Once you un-equip them you cannot re-equip, so keep that in mind. I've tried this with Grenades and Class Mods..it doesn't change anything. I would imagine nothing for Shields as well.