Gail, that's very generous of you and I would appreciate them.
I wondered if I could make the frame in brass, with silver soldered joints.
Could the engine still be completed as a water cooled one if I did that? Kind of half and half?
But I think, as you said, the frame could be done carefully, by reclamping for the milling. I was even thinking that the cavity could be drilled out and filed. Most of my brass modelmaking/patternmaking work has been filed to shape. I'm used to it!
I do like this Tiny engine, but have also come up with a typically crazy idea of 4-stroking an existing 2-stroke. I have a pair of Merco 61s that I got for a tenner at a dog show!. One is fine. The other, well, I reckon a new head with valve gear belt driven from behind could be an interesting design challenge with everything doable on the small machine. I will go and dig one out tomorrow.
But I do think the Tiny could be a first attempt, so I would indeed like your plans, Gail.
I will PM you my address.
Cheers,
Martin