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.