To answer nails, i throw about 17.5-18 pretty much every shot, becides spares ofcorse, im a high tracker, I come around it a bit but not too much, the ball has very little to no tilt, it looks end over end just angled at the pocket. as for my equipment its in my profile, the ones i use the most are: ultimate inferno(pin down cg kicked)-500 matt, dirty bomb pearl(pin down stacked)-brunswick factory high polish, absolute inferno(pin up cg kicked)-ruff buff.
the DP and AI cover about the same ammount of boards, but a verry different shape on the lanes. the free arm swing thing i have tried that today, because i pilled my bicept saturday durring travle leaug but i need to bowl today, last week for school, and the bottom of the ball was just at the half line of my head, thats as low as it gets for me, unless i force it down, the speed was aout 17. most the leftys ant my house are looking at about a 15 pin drop in average because most arent very good spare shooters and there is no drive to the pocket to carry, right handers frst games are bad but gradually get better as they break down.