Three wheels or four?

"Doki" mumbled:

Morgans were widely used for touring when they were around.

I meant the quality of the rack. IIRC it was a bit skewift, looked like it was made of pine and alu pipe, not quite up to what I'd expect from Morgan.

Strange. I'd not find it difficult to make a device with non driven wheels to have the C of G I wanted, regardless of wheel size. Perhaps you never made carts as a kid?

Because they are more stable on an uneven surface, and easier to adjust for level. On an even surface, a four legged stand would be more stable.

Camera tripods are obviously three legged, but camera dollies (apart from pedestals) have four wheels - even the type which don't go on track.

looked like it

from Morgan

Homemade? I don't recall Morgans fitting a rack as std, but one may have been offered as an accessory. Mike.