The worst problem I have seen with the bubble level setups is that the V blocks in each end-follow the curves which may be way off
Many novices sand the leading edges on each panel such that the true cl is high on one panel and low on the other
It's a left handed right handed thing and very tough to see in some cases
Of course if one never has built from scratch - these things are not apparant.
As for all the incedence stuff-and how much is needed, that's another thing as on most really GOOD aerobatic stuff the required force difference from upright to inverted flight may be only a couple of clicks of elevator trim.
After 40 or so years of doing this stuff the really relevant stuff becomes pretty obvious.
Get it really straight -
find a really good compromise in balance for inverted vs upright flight
Then fiddle with the rest of it if you must
you will do best if you stick with a setup which is easy to predict -then fly it -a lot
One winner I knew flew with the elevator control reversed>
Anotoer flies with no expo (how -I don't know )
Others can take any basic setup and whip up on the rest of the bunch simply because they FLY each part of any maneuver and don't expect any hands off flight .
Having a huge reserve of thrust is misunderstood by those who have never flown electric and found the profound differences it can make-This also eliminates the thrust adjustments some feel necessary for UPlines where speed decay is a problem.
A fast trip forward to watch really GOOD indoor aerobatics -shows how important power can be in the equasion .