Starting to get there now.
Found a few errors in my design that need correcting.
1. The reciprocating crosshead bar fouls the rocker, someting I missed in the Solidworks model, during my design effort. The solution is to add a heavy 5 x 45 degree chamfer to one corner to give clearance.
2. I drilled and tapped the steam input port on the steam chest on the wrong side. I've added a plug to correct my error.
Yet to make is the aluminium piston, Ertalyte (PET) piston rings, Crankshaft Bearing housing, the PTFE stuffing glands, some stiffening plates and spreader bars for the base, and some bracing for the steam inlet and drain cock plumbing.
I found a temporary flywheel I need to add to the crankshaft to test all works before making the final designed flywheel.
Regards and happy Xmas.
Chrisjh