Mike,

Great article, thanks.

I should have been more clear about the
Arf I refered to. It was Pre hinged and only
one Aileron hinge spit in to.

I admit I was putting a lot of stress on the hinges
also. I was doing Cuban 8's and Hammer head turns
and such. I noticed there was something different at
the top of loops and when i rolled. After landing I checked
the plane over and found the hinge had spilt.

I repaired at home and been flying it even harder and no problems.
btw, I saved your articles for future reference.

Bob