This is a canopy I modeled for the AXN - CLOUD FLY 1280mm glider. After printing, I also glued on 2 small 4mm magnets on each end to keep the canopy from falling off during flight.

Printing in the position in the photo is vital to get the perfect smooth surface you desire. It prints great with the brim and only couple of supports. (Wish I had taken a photo, but I promise it won't fall over if you use the print profile I used)