I drilled the mounting holes in the UHMW block and countersunk them for AN509-10R18 screws (which probably have to be replaced by R19 screws).
I then drilled a 0.130″ hole for a MS24665–359 cotter pin. This seems rather thick, but if the main canopy latch fails, the all of the force trying to pull the canopy open is carried in shear by this cotter pin.
Afterward, I drilled and installed the block to the canopy frame. I’ll install the cotter pin for good once I’ve painted everything.
