Try the ASW 15 portal - www.asw15.org. Its a pretty good site with
worldwide input. You can pretty much forget hinging the canopy. I
think it was done once, with the canopy hinged a the rear. My
understanding is that it was very expensive. The removable canopy is a
bit of a pain but you get used to it. You have to be careful of where
you put it when its off the ship, particularly in windy conditions.

My trailer is a semi-clamshell of an unknown make but it has two gas
struts on each side. It works well except in really cold weather, but
I don't fly when its that cold anyway.

Mike
ASW 15