Gassers have more vibration, and sooner or later it takes it's toll. From my experience, in the first 100 flights you're going to find out if the cowl is mounted properly, whether or not the hatch hold down mechanism is a good design, if you did a good job fastening the canopy to the hatch, loose covering, maybe some glue joints that weren't done quite right.

You want to be sure to use blue loctite on most all fasteners, and when I mount my cowl, I always install Sig rubber grommets to put the bolts through. Just running the bolts through the fiberglass will just about always end up with reamed out holes in the cowl, or cracked ones. There is a difference in setting a plane up to last 150 flights, or one that will go 750 or 1000....

You can't read too much about all this. Go to the Giant Scale Forum and read everything you can, download pics, etc of what everyone does. Then you can try them out and see for yourself what works and what doesn't.....And above all else, don't be afraid to ask questions here on RCU. Someone will always chime in with their .02 worth.