Print as laid, shouldnt need supports.
Will need stronger spring, should be same length as factory, can order 3 pack of extended springs from TandemKross, need to call them tho as its a custom order.
Remove follower plug
Cap uses 1x m3x8 cap head screw
base uses 3x m3x15 cap head screws
heads of screws need to be 6mm or smaller
Snap body onto stripped mag body, install cap
Install magazine follower without pin, and spring, use base to push spring into body, install screws.
This is my version of the +9 extension from galloway precision as i had issues with theirs.