For the PMAX. I am looking at one of the bolt in kits and selling the running Onan. I am not fond of having to pull it and then fix it. Or the option of the pulley system I couldn't find time to complete. If I have a turn-key solution, it will get done. I am sorry to hear your back is giving you difficulties. Mine is slowing me down, but not stopping me yet. Still too many projects...