There's not a lot of space inside this cab - it's mostly full of diecast lump covering the motor and circuit board.
I'd been sent a figure to fit in there but the trip through the post had decapitated him so I had to find a replacement in my stock of little people. Luckily I had a HO builder who, once chopped off at the waist, "sat" at the controls with his hands on the desk. The yellow hard hat and blue boiler suit symbolises the model industrial locomotive driver for me. An older prototype would see the mans bonce protected by a cloth flat cap.
Anticipating the future weathering activities, I masked the cab windows by pushing in some tape and then running a knife blade around the inside edge to trim it exactly to shape. Of course this meant I couldn't be certain the driver was looking through the windscreen properly so I should have left this for a little later.