i'm not saying i'm perfect or anything but I don't think it's my form. i have a standard z, ghost stamp z, new esp (production) and a glo z. the first one can handle plenty of power, kinda like an Ontario roc and can handle a decent amount of wind. the others turnover a little on the same hyzer line even though they're brand new. not sure about the esp off the top of my head but the other two flippy/touchy ones both have COMET etched into the rim, not sure if that has anything to do with it.