Well Ive only started posting today and he's helped me out alot already! I also read all 80 pages of Pioneer thread and I can see that he is a real wealth of knowledge on these old saws. I Just hope to get mine running I don't expect it to look anywhere near as nice as his!
The 036 and 038 Stihl saws use 48 mm rings and the 1420 uses 47.5 mm rings so with some careful measureing the Stihl rings could be end gapped to fit the Pioneer 1420 cylinder. There is always a chance that I could find a set of NOS rings somewhere in the system if you really need them.
Pioneerguy600