I have used these.. I used the 8000 and 12000 to try to get a super fine finish above 4000 abralon.. my thinking is that it would allow the ball to have even a bigger backend..
result.. yes and no..
It made the ball skid alot with too much speed... you had to slow the ball down alot for the ball to react.. but when you got it to react on the backend it was very quick and angular..more than the 4000 abralon..
It definitely provided more length.
I also have a .5 micron polishing powder that I used that created a similar reaction.. makes the ball very shiny and mirror like..
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16-17 mph,350 rpm,PAP 5 1/2 x 3/8up, HighGame 300 x 3, High Series 808
Book Average 205,PBA Xperience ave180