Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

I built a PM#3 last year.

https://www.officeofsteamforum.com/general-discussion/pm-research-3-steam-engine/msg25531/#msg25531

All the PM Research kit's I built seem pretty nice.

Thanks for posting krypto! About all I can judge on a video is how true the main flywheel runs...and more importantly if the engine will run smoothly at low rpm and pressure. Yours is among the best I have seen! Well done.
  Ok, the thread will remain open as I like the sub $150 category as there not super involved projects, but I have pulled the trigger on a #3 casting kit. The single sided crank shaft greatly simplified machine work required.