NMRA British Region Forum

Yes; I've got one that I've fitted with a micro-motor and 30:1 reduction gearbox. There's obviously plenty of room inside the shell for a chip, and a speaker if you want to go down that route.
I have mine semi-permanently coupled to a "snail", in this case an Athearn F7B without motor or worms but keeping the metal wheelsets for power pickup and using micro-connectors to link the two units.
I'll get some photos and send a link to them later.

Dropbox link:
https://www.dropbox.com/sh/b3xum4unmqio ... mIFqa?dl=0

It came from eBay. I'll dig out the link later.
The wiring is straightforward and for the mechanical connection you could use either a length of model aeroplane fuel line or some brass tubing, depending on what you have to hand.