Author Topic: Full roller layout with no thumbhole?..... (Read 4650 times)

anorexicwonder · « **on:** June 02, 2010, 06:17:16 AM »

Ok folks. If drilling fingerholes only for a two-handed no thumb bowler who usually has a full-roller track, where do you put the pin?

Keep in mind, to be legal the CG must be in the bridge or very close to it. Still put the pin at around the 4:30 position relative to the CG and fingerhole orientation?

Please help me out here, thanks.

JohnP · « **Reply #1 on:** June 03, 2010, 10:54:31 AM »

I've never drilled for a no-thumb full roller, so this response is "best guess". Not drilling the thumb hole shouldn't affect the track location substantially, so I would use one of the regular full roller layouts. USBC has revised the static weight limits for no-thumb balls so that the top weight spec is now 3 oz instead of 1 oz, so it's not quite as difficult to keep a no-thumb ball legal, especially when using a balance hole. The link below takes you to the USBC equipment spec manual, the weight specs are on P. I-3. -- JohnP

http://usbcongress.http.internapcdn.net/usbcongress/bowl/equipandspecs/pdfs/2010-equip-and-specs-manual.pdf

LotsaBalls · « **Reply #2 on:** June 03, 2010, 11:26:39 AM »

If he is a true full roller and your not drilling a thumb I would place the pin according to his PAP since there is no thumb to hit.

JohnP · « **Reply #3 on:** June 03, 2010, 09:27:37 PM »

But you still have to be concerned about flaring into the finger holes. -- JohnP

Author Topic: Full roller layout with no thumbhole?..... (Read 4650 times)

anorexicwonder

Full roller layout with no thumbhole?.....

JohnP

Re: Full roller layout with no thumbhole?.....

LotsaBalls

Re: Full roller layout with no thumbhole?.....

JohnP

Re: Full roller layout with no thumbhole?.....