Hello all, I got a immortal pearl and redrilled it pin over ring and cg 1/2 from the midline and the (virtual mass bias)ended up 1/4" right of the edge of my switch grip thumb edge.... Now I was tempted to motion hole this ball ,but was advised that since this is a anti-mass bias ball its not a good idea.... So is there a special way you have to place a balance hole on the immortal pearl? Or is the standard gradient line balance hole placement what I should use?
id like some help from those that are more knowledgeable on weight hole placement to help me pick the correct spot whether it be p1-p4 or maybe a mo hole will work ...but please give suggestions ... Thanks

I'm looking for the most backend & drive through the pins...
pap is 4 9/16> 1/4^
475 revs
45* rotation
15*tilt

Quote from: hyme29 on July 02, 2013, 12:20:04 AM

Hello all, I got a immortal pearl and redrilled it pin over ring and cg 1/2 from the midline and the (virtual mass bias)ended up 1/4" right of the edge of my switch grip thumb edge.... Now I was tempted to motion hole this ball ,but was advised that since this is a anti-mass bias ball its not a good idea.... So is there a special way you have to place a balance hole on the immortal pearl? Or is the standard gradient line balance hole placement what I should use?
id like some help from those that are more knowledgeable on weight hole placement to help me pick the correct spot whether it be p1-p4 or maybe a mo hole will work ...but please give suggestions ... Thanks

I'm looking for the most backend & drive through the pins...
pap is 4 9/16> 1/4^
475 revs
45* rotation
15*tilt

1.) I would get the Motion Hole out of your head as the layout doesn't suggest it. The core has to be radially symmetric, or close to it, in order to do it. A motion hole with the current layout would merely be an experiment. It could make the ball a beast,..... better chance it makes the ball do absolutely nothing different.

oh exactly my main point id like to give it a try cause I believe the core is asymmetric before drilling cause of the light cap on the back but the ball becomes more symmetrical after drilling or at least that's what I gather by the design of the ball

2.) 1/2" for the cg from the midline? Where is it with center line? Is it located above or below the midline? How much are the static weights? This will tell you exactly what you can do as far as weight hole placement.

it is 1/2> 1/4^ of the center point of the midline

3.) Throw it and see. If its legal as far as statics and it rolls great, then I wouldnt worry about a weight hole, but throwing it will give you a greater vision of what the ball will need.

Quote from: kidlost2000 on July 02, 2013, 05:57:47 PM

Very cool. I used a 1" hole 3.5" to 4" deep. It is 1" to 1.25" down from my center grip. My thumb is pitched away so I pitched the x-hole at 0, 0. If your thumb is at 0 fw or rev or if you have some fw pitch then pitch the x-hole fw as well to keep from intersecting.

By coming down the center grip towards the thumb it has a bigger effect then being on the center grip and you cant feel the x-hole because that part of your hand isn't touching the ball.

sweet i have 0lateral and 1/4 reverse now i do use switch grip any precautions i should use?