I found some 1" 18 swg seamless stainless on t'internet, so have that coming along with some aluminium same size for the sleave in the 97 comp tube. I suspect the aluminium one wont get used and I'll just dive in with the SS.
I 'think' I can get the piston sorted by either getting one reduced in a lathe, or make a new body from an aluminium tube, fitted to a bodyless 97 piston I have kicking about.
It will be 81 or 82mm stroke, and I'd like 10ftlb or so. I am thinking of starting with 170-200 grams on the piston and 3.7mm on the transfer port (because the comp tube I have free is 3.7mm
)
Does any of that sound wrong?