Yip.Do the cranks make that noise if you spin them without the chain?
I can't isolate it more specifically - maybe it's my age (58).Can you localise the noise any more by putting your finger on various parts (BB shell, spindle ends, what look like outboard bearings...) and seeing if the clicking feels stronger anywhere more than others?
It seems so when hand-turned - fairly smooth when sitting on and pedalling.It sounds like dry bearings to me. Is the movement of the crankset notchy as it goes round?
Nope - steady as a rock.Is there any play if you grab the cranks and waggle them from side to side?