Also, allow me to throw something else into the mix...

The cg isn't always marked properly, so technically, it could be the same spot, heavy spot wise, but the engraving could be off.

And no, I will not accept anyone telling me that that doesn't happen anymore. I found out the hard way that my plastic ball (Which I never weighed, because I drilled it right over the "CG") had an ounce of side weight.

But the CG was in the right spot, right?

Let's get another 3 pages out of that subject!

I want to comment on the video by Kidlost above.

It is tough to comment on all the various variations of board reached at the ultimate projection point.  (Starting near 10/9 and then getting out near 6)  in the later versions.  Increasing friction as the condition morphed, and increasing axis rotation as he went deeper

A very dominant midlane bowling ball with almost no pure backend.  That is what I find when I drill weightholes like that.  But too many variations to be really science with controls.

Very good bowler though!  With a real feel how to play the lanes and make strikes, when he wants to.

REgards,

Luckylefty
PS I've also had some very nice success with very non dynamic statics and get a similar all midlane hook and roll look, LOVE it!

I would like to comment on this thread, it was conducted in general in a factual and informative way.

I have learned a lot about weighholes and refamiliarized myself with Mo Pinel's Gradient line balance holes and just set up a ball for just that!  I would like to commend Scott33, Impending Doom, and Kidlost(one of the most amazing guys on this site) for making significant efforts to inform, advise and stay above the emotion of this topic.

Also, I would like to acknowledge that many are saying that many bowlers only want a positive CG to use a reaction minimizing, stabilizing, or enhancing weighthole.  I get it!  I drill nearly everything positive also.   Because it gives, me what I want for most conditions, midlane and backend which strikes!

Inherent in getting to that point of drilling weightholes are drill angles of between 30 to 65 typically which I believe help to supply those things.  Midlane always present.  Delivered from the ball.

THe only time I go to bigger drill angles of 75 to 130 is very specialized situations usually involving more lane friction earlier  Midlane supplied not by the ball but by the friction in the lane.  In these situation I am rewarded with what I expect often  also.  I'll post separate on that subject.

Regards,

Luckylefty
PS Thanks to all particularly those noted above.

For those who don't believe I believe in the significance of weightholes.  Of all the BrunsNick videos, this is my favorite.
http://www.youtube.com/watch?v=c93ZRsWbF7U

I have been a big user of Weightholes deep in PAP, for midlane and backed off backend.  Holes down for midlane.  I have also used 9 inch weightholes out from grip center for nice inside recovery on mid diff balls.

I am looking forward to applying some of Mo's concepts of Gradient Line weightholes.

Regards,

Luckylefty