Per some advice via a Chapter meeting, I ordered a hand drill to enlarge the existing #40 and 1/8" holes in the canopy to #27 using a #27 plexi drill bit. Available from Ace hardware. Will practice with some scrap before trying it on the canopy. Theory says it should work, if it grabs you can stop and back it up.
Fiskars Hand Drill Link
The only other method that was recommended to enlarge existing holes was to use a Unibit at a very slow speed. BUT, the first Unibit step is 1/8" (approx #30) and the next step is 5/32" (approx #22-#23).
Have been told by a number of people to never enlarge an existing hole with a normal drill bit or a plexi drill bit in a pneumatic or power drill as the bit may grab and plexi will snap back before you know it.
Canopy Hints Link
