Finished canopy release; well, almost. Finished fitting all parts, match drilled release arm WD-618 to release shaft WD-619 and secured release arm to channel F-643-1 by drilling a hole in the bottom flange of the channel and fitting the bolt, washer, cotter pin, and castle nut that would have been used to attach the jettison handle WD-620. As now, it is as or more secure than the stock setup (since the release arm is secured). However I will eventually replace the modified AN43B-16 bolts with stock AN43B-16 bolts, and use nylock nuts to further secure those.