so i have mine set to 3 times  like this:
"General Item List Multiplier (All items in the 'Manual Item Multipliers' List)": 3.0,
"Non Item List Multiplier (All items not listed in the 'Manual Item Multipliers' List)": 3.0

but i don't want c4 and satchels to spawn more than 1 per box of any type. 
can someone please tell me exactly what to do? there is a section called "Blacklisted Items" but developer says it prevents things from spawning but that's not what i want, i want c4 and satchel to spawn but not spawn 3 next to each other and even if this is the part that i need to tweak, i have no idea what to do. so if anyone knows please type it in a way so i just copy-paste it because I'm terrible with software.