This kit saved the life of the RE-501 I purchased. It was in neglected condition and disassembled when it arrived (even though the seller said it was playable and "only missing the pinch roller). After thoroughly cleaning all the grime off the PCB's and metal pieces in an ultrasonic cleaner, I installed the EchoFix Full Service Kit, Tape Bay Thumb Nuts, and Motor Rebuild Kit and the RE-501 played beautifully. Thanks for making these kits!