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

A fine deal you struck there in my opinion Ben.
The 85 is a WAY better engine than the D3!

No steamline, the steamchest is screwed directly onto the boiler.
But it is very easy to ad a control, as the single exhaustport exits opposite to the cylinder rear end.
Not much magic needed, to ad a valve there restricting exhaust.