So
this is the InAccurate Armour piccie of the upgrade and the brackets for the drums are the kit mounting brackets. Nothing in the InAccurate Armour instructions says you need to reposition the kit mounts and the piccie shows them in the correct position as per the kit instructions.
and this is what the drum looks like when you’ve stuck the bloody kit mounts. The drum brackets don’t fit inside the mounts.
work that one out of you can when you look at the positioning in the first piccie and compare it to the second.