Hey Pat,
Thanks for the input. I'm still kind of new at this stuff so I'm trying to establish some baseline references. I know what I had at 1.5 wasn't good. The manual on my 2.6 Compy says start at 2.5 degrees and when out flying with someone you know who also does the sandbox thing, his new 2.6 Compy was at 2.5 and he felt like it needed another .25 but didn't have time to try it before he left again. In looking around I found out you cannot buy shim stock anymore (guess I'm giving away my age here...) so I've got some .020 A/C aluminum I can make shims out of and I hadn't thought about slotting them, just pulling the left side mounting hardware, but the slot thing is a most excellent idea!
Whether or not one wants to fight the issues with a more neutral offset is kind of a personal thing, I personally object to the thing turning left on uplines unless I ask it to or I can't figure out how to compensated for the X-wind because it's inverted....
I do know that after about 40 or so flights, I had this little puppy flying quite nicely thank you very much, and when I put the engine back on it the first reverse sharks tooth bit me in the butt. Of course my UAV buddie's first comment was "You got that thing trimmed?".
So now I get to go do some more "trimming"....