I don't want to get into a scrap over the anti spin devices, but I don't see how they can be installed incorrectly -- they are as simple as dog-dirt. I've also seen them seriously mangled, including chunks missing and repaired with lumpy applications of tape, without affecting anything much at all, including in-flight performance.

IMHO, the real problems can be attributed to:

1) pilot inexperience
2) incorrectly configured nose-wheel linkage
3) pilot inexperience
4) incorrect right thrust
5) pilot inexperience
6) cross wind sensitivity, due to substantial dihedral
7) pilot inexperience
8) toe-out or looseness in the main gear
9) pilot inexperience
10) sticking main wheels
11) pilot inexperience
12) uneven runway surfaces
13) pilot inexperience

I'm not dissing anyone here, but flying these things isn't difficult & taking off isn't either. The excitement goes away with a bit of practice. A good pilot can whisk one of these birds straight down a runway in a stiff cross-wind, even having to two-wheel the thing with the upwind wing rolled into the wind. Inexperience is just that-- inexperience -- it goes away with practice.