Rmstator website says direct replacement of OEM,and the kits even come with a 27mmx1.0 puller.
All Rickystator's pullers say 27mmx1.0 on his website.
Banshee's are 27mmx1.0
Do you have both pieces of the puller or did you loose the outside, bigger piece or leave it in a flywheel you pulled off?
Without pics, It's hard to guess what you got going on.