I just purchased this a couple of hours ago, as someone who has driven these in the early 1960's
on the Midland Region, got to say I am very impressed :O)
Hope you keep on with updates :O)
Charlie, thank you for the very generous tip! If you have any stories or comments to share in regards to the performance or operation of the units I'm all ears! I know that the brakes in the simulator are probably underpowered at low speeds because the behaviour of the cast-iron brake blocks is not simulated quite correctly.
Updates will definitely be continued barring any force majeure! The progress might be a bit slow because of the genuine complexity of all the stuff involved.