When I first started this part of the canopy project, I figured, "sure, I'll put it in, why not?"
Now that I've built -- pretty much -- the rest of it, my only thought is "are you kidding me?"
The little ground-down bolts (now "pins") are handy for taking the frame on and off for the 10 zillion times you have to do it at this stage, but once I built the rest of the frame and fit the canopy and all, I realized what a joke (again, this is only my opinion) the whole concept of an in-flight canopy jettison is. First, the only reason I'd do it is if I had a parachute. That's not likely. But, second, it seems to me that even if I could fly the plane while getting the canopy jettisoned (doubtful), everything has to go perfectly when it finally blows. And maybe it will...but it also seems likely it'll take my head off or, if I'm lucky enough to get that far, it takes out my VS.
So the advantage of it, it seems to me is getting it quickly off on the ground. Well, if it's an emergency landing, being an "A" and all, I'm probably going to be upside down. So that's not going to work. And I can more easily accomplish getting it off by banging the **** out of it with a heavy tool, which I think I'll use in exchange for the weight penalty of the Van's system.
To me, there's a whole lot of weight there, with no real good reason.
But, again, that's just me. I certainly respect the decisions of others.