Hey all.  A good freind of mine sold his Fast to me (it was $10 so I couldn't pass it up) and I was looking for a ball to use on a THS around the 3rd game.  I am using a Mutant Cell (50x5x65) and an Evil Siege (65x5.5x45) but both I can't seem to get through the heads clean in the 3rd game.  I bowl with some heavy hitters and it doesn't take much to fry the heads and get an over/under reaction come the end of the 2nd game.  His hand fits me and our PAP's (5 over 1/2 up) are very similar, the layout is 60x4x40 and to me it seems this ball is stronger than my Mutant Cell.  I cannot keep it on the right side of the head pin, so do I plug it and redrill or look for something different??  Any recommendations?  2 of the guys on my team are rolling Prodigy's, 1 a Pure Physics, and a lefty throwing a Blue Vibe.  I had a Mars and I hated it.  Looking at maybe a Dark Star, Slingshot, or whatever you all recommend.  Thanks a bunch.  

Tweener, 16.5 - 17 mph, 400-425 rev.