I saw the sole surviving engine in steam in Delhi Railway Museum nearly forty years ago, and it's still there, though not workable any more. There is a carriage too, and I had a ride in it round a circuit of track (rail!) they have there. It was indeed a MOST peculiar thing - naturally the ride was somewhat rough, and that was with a "road" which was smooth. Where it originally ran, the road was a dirt road, anything but smooth. It would have been an extremely uncomfortable, and very slow thing to travel in. I have colour pics of it somewhere, in fact I may have old cine film of it in operation...must look....
Having said that, I wonder if any other IRM folks have ever travelled in an 0.3.0 on a railway with no gauge? Anyone here ever travel behind it?