I just purchased a Guru because I wanted to try a Radical ball and this one looked good. I went out to try it for Sunday morning practice. We always have fresh oil and the lanes are pretty slick. I usually have to start down and in and as the lanes start to dry out some I can move in to 2'nd arrow and swing it some. When I tried the Guru the ball was hooking some early and would quit hooking about 1/2 way down the lane and kind of fizzle out. after 6 or 7 frames it was burning up so I hand polished it some with some snake oil. No real difference so I went to the counter and asked if they oiled the lanes and they said they didn't bother to oil today. So the lanes probably had 20 or more games on them so they had no head oil and tons of carry down. In other words a horrible shot. I hope I didn't screw the ball up by polishing it. I know I can always sand it a bit but it may work fine like that. I won't know until I get to bowl on some oil.

i have my guru sanded to 1000 and polished and it plays just fine. the cover takes changes easily and the ball hooks hard on ths

I've never used snake oil but I wouldn't recommend applying any polish without a ballspinner.

MOtion Hole is not recomended for Assymetric weight blocks.

MOtion Hole is not recomended for Assymetric weight blocks.

Why not? I remember there being two measurements one being 11" past the pin and one 10" past the pin. One for assymetric and the other for symmetric core balls. did something change?

Something did change. The shape of the core. Motion hope in asymetric core balls can be hit or miss.