As a slight diversion, to practice 3D, I've started drawing up a Kerr Stuart Tattoo - from the GAs of the original class loco, though it's ending up as STANHOPE.
Whether it ever progresses to a finished loco, I don't know, but it's a worthwhile drawing exercise anyway.
Printed on my Mars 2 Pro to a 0.01 layer height in Eono's Engineering Like Resin it is coming out well.
People has been extremely kind with information to say the least - which has led to a few minor changes.
This is Mk ll, with the tank bolted on, not riveted (of course!) And a more correct lamp iron for Stanhope. The whistle has also changes slightly and ive adjusted the safety valve so it prints properly. The springs arent exactly correct, but i was bumping up against the limits of my own competence and what i thought i could get away with regarding the resin.
I need to clean things up a little, like the left-over sprue on the smokebox door knob!
The springs in the valve actually work! The cross-section is 0.25 square, and if you poke them ever so gently you can move them up and down! The valve wheel is 2mm diameter.