Cool. As to your comment on the .015 flat as per common practice - I have seen and read this both ways, as you describe and also with great pain taken to "sharpen" the edge. I am not sure any more which is the better way.

Any idea what the AP crank is made of? Good quality steel? Hardened? Would it respond to being hardened and tempered? I know the Norvel cranks are pretty tough. I usually temper Cox cranks before I build an engine but I was wondering if the Norvel cranks would be better off if they too where tempered in the same way.

Do keep us updated, I find this very interesting but then I do like to tinker with the engines (sometimes good and sometimes not so good)

I have an AP 061 and a pre revlite Norvel AME 061 and dug up some Norvel 049/061 parts and looking forward to building something up to see what I can get out of them - I have been using your web page as a reference, no sense re-inventing the wheel but I will put my own spin on it as well.

cheers, Graham in Embrun near Ottawa Canada