Slightly off topic since I plan on a 7.25" version. Does anyone know the reference to the specific works drawing for the GWR 5101 cylinder. I am a long way from the NRM for a trip. I would like to draw up a super detailed cylinder that is prototypical, with a view for a high quality printed wax pattern and subsequent casting.
If you are on Facebook search for a guy called Elliot Ness, he is producing a variety of GWR Locos in 7 1/4" that are dead scale and he may have already done this one/ got the drawings you are after. If not I will ask him tomorrow.
Trying to Finish 5" 9f Producing Scale fittings using 3D wax printing and lost wax casting - www.crofittings.co.uk/ Renovating house stopping all of the above!