I lost my canopy on the second flight with just simple slow roll, I even put a few pieces of foam up front between the dowels to push the canopy back...it landed in our club pond! Not fun. I have a saito .82 in it, so maybe it rattles the plane a bit more. I am putting a piece of tape on it until I get some bigger magnets.
I might note, I did upgrade the landing gear to carbon fiber -
http://www.3dhobbyshop.com/detail.aspx?ID=2179 as my previous set bent on a deadstick landing. They save a lot of weight and look cool.