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Good looking and serviceable solution. I'm glad you found a pleasing way to do this.

Seller is inflating new/current price ... C$551 using RBC's currency convertor today according to Stuart's web site. Shipping is a bit of a wild card but all in will certainly be less than the $1000 mentioned in the add. I'd rather buy new and be sure everything was in the box and untouched.

Another one here ... seriously into RC aircraft from the early 70's until about 5/6 years ago. Before that, control line and free flight. (Think I've still got a couple of RIngmasters hanging in the garage.) My time and attention slowly shifted more towards machining projects. Flying had...

The Technopower solution could be cleaned up if half-spheres were used. With the little bit of oil involved they might seal well enough. Certainly the lowest parts count. Glow engines seem to run in a "fog of oil" anyway so a little leakage just indicates that oil is getting there ... I've...

Yes - it was a Saito (the FS-170 radial). There likely are others ...

The ball nose cutter profile has no bearing on fitment ... it's only there for pretty (and so you can ask about it <grin>). The pushrod tube angle is taken up by the o-ring compressibility. I didn't harden any of the contact surfaces. If I recall correctly, the rocker adjuster was made from...

The pushrod tubes on my Aeronca E-113 uses a spring loaded pushrod tube with o-rings at each end. The tubes are not perpendicular to the head or crankcase entry points. If I remember correctly the corrugated pushrod tubes on a VW flat-4 engine are at an angle as well (the corrugations...

To put it in perspective, take a look at what castings and boiler materials cost ... https://www.ajreeves.com/traction-engines-wagons.html (not the same engine but provides a sense of what these things cost today before any work is done)

Looking good!

The greatest opportunity for disappointment was in store for the buyer of the Holt model (4 cylinder inline). The intake and exhaust castings and build notes went with the Red Wing engine and the crankcase covers were in a separate lot of other misc. small engine parts. Wh o knows about the rest...