I, also, have an Airfix 14xx and have bought a "Mainly Trains" upgrade kit for the body (this was originally going to be used on my K's kit - see separate blog).
However, whilst still honing my soldering skills, I decided to upgrade the Airfix model. Problem is, as you all know, the motor completely fills the cab, which I would really like to detail with backhead, brake and crew, etc.
So, considering the chassis: I wonder if anyone has tried replacing the Airfix motor with a smaller "can" variety, still driving the front (or middle) axle, without obtruding into the cab?
It would need a good hacking about of the cast tank and boiler weights and a suitable "mod" to hold the new motor, plus replacing the weights when I know how much room I have!
Any ideas or suggestions gratefully received.
Jim