At least 50% of your elevator troubles will be caaused by not having the controll horns 100% identical in every plain, on both elevator halfs.
It's a real pain. At least the MK's have some screw thread at the top so you're able to do some seriously A' retentive adjustment to match 'em up.
Mind you, you could be making a bigger deal out of this beause of your IMAC (who mentioned Freestyle) experience.
You'll only be needin' very small throws for F3A. If you're used to *****g out the ATVs, you'll be needing the inner most hole at the servo and the outermost hole at the horn. Even then you'll be dialing it down considerably.
Forget about removing the stabs on a F3A plane... thas not the idea. They're in separate halfs so you can adjust them. Once that done, lock 'em down and leave them!
If you're taking them off after each practice sesson you'll be for ever trimming.