RE: oz cover
I used it quite a bit, but the Importer (Art Grabow) passed away a few years ago and I don't believe anyone else has taken up selling it. I think I use to buy Oz LIte, which was very light. I did know a couple friends that had used it, had paint lift when removing the tape for multiple colors.
He use to also import Ceramic piston/sleeves that were suppose to perform and last much longer than the stock one. I wasn't impressed, and it cost as much as the motor to begin with.