So this is something I've been slowly working away at in recent weeks. The chassis still needs some work before it's ready to ride the rails but I have completed most of the structural work over the last few days.  Just the wheel splashers and boiler bottom to make for the holes in the tanks.  Then I need to acquire a new set of safety valves and the correct whistle, fit the lamp irons and grab rails.  Might look for a replacement chimney too.   This will be my primary shunting engine