Well i bought a switchback about 5 days ago and it groups and shoots awesome. But when the arrow flys i notice a lttle bit of fishtailing, so i bumped my bow from 63 lbs. to 71lbs i maxed it out, and it shoots awesome there is no fishtailing whatsoever. The only problem is, is that i cannot draw 70 lbs. very well, i just shot like 20 arrows a 70 and i cant even feel my arms. [:-] Could this be from the arrows i am shooting 29 in. draw 30 in arrows with a 63lb draw wieght and they fishtail but at 70 lbs with every thing the same the fly fine. Any help would be greatly appreciated. Also i am shooting 100 gr. tips