Follow up on the use of sheet metal screws to hold on the canopy. In a previous post I included a picture of a ShowTime 50 canopy held on by 6 screws along the sides with film over the leading edge.

I just did an engine run-in on a bench at the field. Surprise, the 2 rear screws no longer help holding the canopy on as the canopy cracked and broke around those two screws. This wouldn't have happened if a canopy glue were used.