Araldite
I've crossed active frontal systems in both permit and certified aircraft on both sides of the Atlantic (so legally if not completely sensibly).
In terms of the former - when the hail is hammering down on the windscreen it does rather make you hope the bloke who araldited the airfix kit together in his garage didn't skimp on the adhesive.
Don't get me wrong - I love LAA/EAA types - right on the cutting edge etc... only problem is that in certain atmospheric conditions you can end up being the test pilot...
SB