Russcc, the machine is at Don P.'s, we have used it several times. First we got the vacuum line working again, it was stopped up in the 4 way fitting under the top. Next we adjusted the drive motor, that unit unlike the Sun machine Don owns has a contactor that drops out the motor pulley so that the rubber drive wheel does not get a flat spot on it. Found that problem, cleaned and adjusted. Next we removed the rear upper panel and replaced the 110volt lamps that were bad and installed the smallest CFL bulbs I could find. Next we found that the 8, 6 and 4 cyc. switch on dash did not do anything, Don looked and looked and found two small wires that had came off the selector switch. Seems to have corrected that problem. NOW we have a thread that no one has responded to, it is how to calibrate the dwell meter. We have several dwell meters and everyone is different. Thank you for the help and it is a good unit and will serve me and others for years to come. Just needing a little care and attention, like everyone!