Check the listing for details. Commodore 64 VIC 20 Paddle Controller Potentiometer Repair Jittering Paddle. Listed at 14.70 USD. Due to changes in shipping rates, the prices shown are approximate; please send a message with your address for an exact price. The auction is for 1 x 470K high quality potentiometer used in Commodore paddles. With time and use the paddles become jittering, replacing the potentiometer will solve the problem. Please note that a bad SID or capacitors can also induce jitter. The shaft of the potentiometer is tooled to match the ones in the VIC20 paddles shown in the picture, I don't know if it will fit other models. You need to open the paddle, remove the old potentiometer. Desolder the 2 wires, solder to the new potentiometer, then install it. The fixing hole is a little small (around 9.3mm), you should enlarge to 10mm, use a file or scissors. (Be careful not to hurt!!!!!) Minor adjustments.