Tonight I trimmed-back the protective film from around the canopy screw holes. Drilled some practice holes in a piece of scrap plexiglass and set the correct depth of my micro-stop countersink. Took some trial and error.
Countersunk all screw holes.
Once completed, I updrilled all holes to 9/64ths"" as per plans (so that the canopy doesn't bind and crack around rivet/screw holes).
Lastly, using a cutoff wheel in my dremel, I cut the slot for the canopy latch plate and lock assembly.