Thanks Blick....

I know what you mean about a large canopy hatch coming off in flight. I have lost a couple but luckily it did not affect the aerodynamics too much and landed safely. Both of these hatches were bolted on. I know many of the large (35% plus) planes have "quick release latches). I have watched them remove these at many fly-ins and contests. I have been using my own spring loaded / pushrod plunger system for a while with good results. I was just curious what others were using and if it sounded better or easier to make I may try it.

Steve