You're a dope Lawrence, everyone knows it's 26.37 degrees! You should consider selling all your RC gear before you hurt someone.

No seriously, Ed if you're still listening, start somewhere say 30, and fly the airplane. Make changes in 5 degree increments until you're happy with the performance. I've flown many scale models that all seem to react differently. Some pitch up, some just slow down, some snap roll into the mower shed. No, not really,

If all this doesn't make sense to you, maybe I'll buy all your RC gear. Look me up.