THe Cap for me was snapping always in one direction, to the right . It wasn't bad either - it usually rolled less than 90 deg. I'm not even sure it was a snap, since it wasn't instantaneous, and I could counter it with aileron.
I had taken all the steps mentioned here, incidence check, lateral balance, small elevator throw, turbulators. However - I started slowly increasing elevator because throw was so low I wasn't comfortable landing it. Pull too much in a left turn, no big deal. Pull too much in a right turn, it'd go over on it's back.
I was getting a handle on nice landings, doing touch & goes when the engine quit on takeoff at 45 deg nose up. Round over the top and pull back hard - no luck. It didn't snap anyways, but it did pancake, hard. One of the wing panels busted in half and flew up in the air. Broke the spark plug off at the base of the ceramic.
It would be reparable if I was interested in trying to true it up - but this plane had too much "personality" plus it was built way tail heavy. I had to put a pound of lead in the nose, along with my Brison 3.2 to get it to balance. I'd rather start over with a kit I can build light & straight from the beginning. I went to Aerowork's site to look at their 29% Edge - and they don't make it anymore
Anybody in the Central Florida area want a project? Needs a new wing panel, cockpit canopy, and cowl - available from Lanier. Otherwise, needs a few things on the fuselage tighened up and some scrape - repair. You can have it for free....