I use this same grip. When I'm having troubles it's from too loose of a grip or bad follow through. Wobbling doesn't bother me as much as my lack of follow through and short arming. If it wobbles and consistenly goes in, who cares.
Bag: Opto Fury - GL Fury - VIP Stag - DX Gazelle - DX Teebird - SOLF - DX Roc3 - Glow Roc3 - DX Cobra - DX Stingray - Pro Pig - Fuzion Judge - Hard Judge