BTW, I have an idea.
Sanctuary_Dynamic.upk\gd_slotmachine\WeaponPools
there are 5 files, how about to make them all Pool_Weapons_SlotMachine_06_LegendaryLong.ItemPool Definition, how about make copy-paste this file and rename it to
Pool_Weapons_SlotMachine_01_CommonLong, etc then pack to .upk again and check how the drop would be.
I'm have stopp'd on packing, cause dont know how to do it.
My skype is: Echo_o1, who knows how to pack back to .upk pls write me.