Find center line on 7L2-1J main gear spring and finish the 4 notches. Set up and drill 4 wheel mount holes both sides. I had our machine shop cut a jig for me and it worked very well. Hole alignment is critical. cut and drill gear plate 7L2-2J (2) then cut two pads for assembly.
I took the advice on the Matronics Chat room and ordered the upgraded pads from ZAC and I'm glad I did.
