tennis-skater
Semi-Pro
my club has a prince machine i believe its the neos im not sure. but the calibration on it is way off and their looking into getting a new machine and i might be able to buy the neos for cheap. its atleast 10lbs off. before i buy it id like to try and calibrate it to see if itd be worth the money. how would i calibrate it? what would i have to buy?