I know that this is a question that's probably been asked a hundred times, and from what I've read on the internet opinions vary but seem to have changed, meaning that more people see pro pin balls as useful.   And Storm says (and I know that they are just trying to sell bowling balls) that pro pin balls have "enhanced dynamics" and "increased versatility" which pretty much flies in the face of other stuff I've read that says that they are of limited use, have limited layout options and can only be used by high-rev players.   So what's the scoop? 

The reason I'm asking is that my son bought a NIB pro pin Sinister on eBay not realizing what "pro pin" means.  He hasn't got it yet so I don't know the exact specs, but now we're wondering if it's gonna be a 16lb paper weight, try to resell it or get it drilled.   

Opinions welcome!!   

Well, the driller took one look at the ball and said "no problem".  With the layout he's going with (pin up) he said the pin will be a little higher than what you're used to seeing, but it won't be a problem.  And not sure it'll need a weight hole until he gets it drilled.  He went on to say that the only problems he's seen with pro pin balls is if the Pin, CG & MB (I'm pretty sure those are the three things he mentioned) aren't in line, or close to it.  He said that if the CG or MB are kicked to one side or the other, that's when it gets tricky. 

Thanks again!!