Wow, that's a bit much. More than half the price of a new motor! Ideally, Mike's heatsink/clamp would be a better solution, but I'm not sure now if he's gonna make them. I hope he does, because there are other 36mm smooth motors out there where they can be used.
I had to do the same thing with my Faegiao motor because the rear kept popping off and a bad wreck into a storm drain took the front endbell out. I used 4-40 X 3/16 button head screws. And also used the Green Locktite sleeve retaining compound. (it's what they use when they have to replace a sleeve in a lot of LS and Hemi and other engines). I had some laying around and Snelliemin needed to bond a rotor back onto the shaft of one of his motors.
The Warnings & Cautions discussed in this manual cant cover all possible conditions/situations. It must be understood that common sense and caution are factors which cant be built into this product.
jb weld would hold it for life. I used it to secure the front endbell of my huge kb45, and its spaced 4mm from the motor mount with one of mikes spacers, yet it holds the weight of that huge motor.
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It's "Dr. _paralyzed_" actually. Not like with a PhD, but Doctor like in Dr. Pepper.