I talked to a guy he said he would make me a reversable direction disc sander with a 1.5 horse motor what would a decent price be for one. He was telling me its the only way to make perfect grinds . Is that true or a sales pitch.Would a 9 inch be the best and how big should i get for a motor.This guy also builds grinders and has a single 2x72 for $400 without a motor. please let me know i dont want to buy a grinder that ill regret.I saw the guy use his and looked real good he has a single and a double so he doesnt have to change belts as often. thanks for all your replys . kellyw