Hi Steve, Recently I installed same SPARX stator. I ground 1/2” deep socket to paper thin. That’s basically what you’ll end up doing. Or bring box wrench
. So thin it started cracking.
I don’t know where mainland is for location. As tinkertoo said going together use 7/16 wrench
size nuts. That wrench
size in lock nut not stocked anywhere I could find. eBay has them.
What I ended doing is getting 1/2 fine thread coupling nuts from Ace hardware. Cut them shorter. Used split type thin wall lock washers & trace of blue lock tight. I still had to grind 7/16 deep socket.
Cutting potting back, I don’t know what to say. I had old melted Wassell stator. It also was very close but ground socket worked fine. I took Dremel & cut bac potting to see. Less than 1/16” to wire…. So go easy. The flare of potting at base I cut back slightly.
Rotor clearance was problematic. I trial fitted 2 original stators. They cleared rotor perfectly. Slid onto studs perfectly. So studs straight & true to center.
I had to sand potting between poles a lot. Slightly over a few poles. You could visually see the high spots. Used 80 grit sandpaper. Sands nicely.
8 hours of fiddling later it changed perfectly.
To file laminated stack I held carefully in vise with smooth jaws & small c clamp to help pinch stack tight. A lot of trial fitting.