i was talking to a friend of mine and he read an article that stated if one wanted to bring their track away from the holes a little bit, to try adding about 1/4" lateral, which would put the thumb closer to the palm.
not sure if that is true or not. i track high as well and may try this in a ball just to see how it feels and if my track does get a little lower.
i have 2 pin down balls. 1 is 4 1/2" away & other is 5" away, and both of them are very close to thumb. i would think if you drill a ball with some flare, that it would help get it away from the thumb a little better for ya. just some thoughts.