I have a 180 in mine I run CP 30% heli fuel and I can spin my 18x6 well over 10k on most days, I usually dial it back to about 9600. Anyone who doesn't believe a 180 will give unlimited verticle is welcome to come watch mine disappear with beautiful smoke trail behind it.

Only problem I have is that it has a nasty snap if I try to do any wall type manuevers going to try mixing it out, but it has been annoying. I can do most of the manuevers nicely but it won't flatten out in spins, and will not do waterfalls (which i can do all day long on my Ucando 60) because of the snap problem.

I checked wing incidence, it is fine. All surfaces have been checked for level/correct. No aileron differential. I tried adding a bunch of weight to the tail to get it heavier in the butt, but it didn't seem to make much of a difference. Kind of frustrating because it flies IMAC style pretty nicely but doesn't want to 3D very well in any sort of high alpha manuever....