And please enlighten us all - how do you account for squirt in the use of aiming systems? Not trying to be a smart a$$, but I think that 75% of the AZbilliards users of aiming systems have no idea of what is involved in aiming a pool shot when you throw english into the equation. It is very much like trying to use two dimensional space to try and predict what happens in 4 dimensional space in physics.
BHE.
All Hal Houle systems use BHE.