Hah you won’t like this but I just sold a brand spanking new oem jony piston cylinder like five days ago.. buddy bought it for his 61 thinking he’d get a dual ring setup lost all his steam on that project and gave it to me. But I did find a jony 670 tank that looked in good shape minus the throttle things broken on it which I probably have 2” of somewhere. Didn’t have much time or drive today after a 14hr shift and a pooched back. But I dug around a bit. I found a starter cover for the 670’s and I’m like positive one of the top covers is jony 670 too because I ordered a new pair for my champ cause something was slightly different maybe it was a a 630 cover I was trying to use and had to get the right one idk.. too many saws.