RE: Co-Comanche
Sounds like the cheap blades are to blame.
First, check the blades for balance. If out of balance add weight with tape. I use clear shipping tape.
Next, check that the blades are tracking correctly. They should look like one flat blade when rotating. If they look like they are going up and down at the tips, bend untill they track.
Next, spend the extra $$ on a set of Xtreme blades. Very strong and well made, although I have had a set that didn't track. Easy fix, just bend.
Or if your are done crashing a lot (LOL, that happens?) just put stock baldes on. Not as strong but if you don't crash, they work fine.
BTW, leveling the swash is a baseline only. My V3 hovers perfectly, yet the swash has a slight aft angle. Set the swash to whatever works (might not be level).
Hope this helps.