Dear Charlie, Andy and Angus.
Went ahead with fabricating my own head gasket.
Did take me several hours (evening hours, after work) spread over a week to cut, adjust, make the holes, quench and finally put it back onto the engine.
I started and tested the engine yesterday. I had it run for 10 minutes in at least 2 stints.
As I re-installed the governor linkage to the carb, it now stabilizes nicely (had to adjust the carb). As I had ordered a gasket kit, I had several types + thicknesses of gaskets so used the opportunity to fabricate all the gaskets for the carb + intake and for the exhaust.
A few photos to illustrate.
Of note that for the copper plate, I mainly used the “special scissors” I had from an old medical kit and a “Dremel” to refine/adjust the cuts/holes.
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