Just seen that.

Very strange hope he's found safe and well

It did occur to me that it seemed a bit "inappropriate" on that trike, but then I don't know the capabilities of it, or its rider. I thought the gate at Croick would be too narrow for the trike too.

If he has gone via the Allt nan Caorach then that would be particularly difficult and, potentially, dangerous given the drop to the left.

There are a few non-obvious route options so a simple wrong turning is a possibility. A few bothies scattered around too so he'll hopefully be making use of one of those.

No longer missing.