I believe your edits to "[WOTC] Set Item Weight'" are stacking with the configs within that mod, according to a discussion thread on that mods page.

Because they set "+SET_WEIGHT_CLASS=(WEAPON_CAT=cannon, SET_HEAVY=1)" it is giving the entire cannon class a Heavy classification, whereas your edits change each tier individually.

I am about to try editing your file, by instead of commenting out their configs with a ";", and instead, cancelling them with a "-".

I will let you know if my assumption is correct.

Thanks

4 upgrades from the start, so breakthrough would make it 5

For assault rifles, is it 4 upgrade slots including the breakthrough slot or do we get a 5th slot? Sorry but I havent had time to test and see and I thought I would just ask