Well, I've got 1.3, 4, 5, 6, and 9s. 3, 4, and 5 are board flat. 3 and 4s have nice turn but get squirrelly if overpowered once they're worn in. Controllable for sure, but don't glide to flat. 5 is freakishly OS, like a fresh SOLF. Mine in absolutely flat with a high wing. It's pretty beat but still doesn't turn much and fights back. I like it, but it's not an OLS. 1.6 is stiffer S plastic and domey. Flies nice, good glide, and turns nicely after initial break in. Ready for the good part? 1.9s are the current run and as good as any prior run. Medium dome, soft grippy S plastic, really nice swirly color blends,and great turn with enough LSF to finish flat enough not to dig in and roll. QOLS is great too. That's all I got. Hope it helps.