Will, I only met the once but I remember RD from years back. I'd not that long (lets say 2 years) been trying to play (GDAE tuned) tenor banjo and this guy said he had only just started and asked to look at my instruments (the other was a mandolin banjo). He then proceeded to do all sorts up the neck - things I'd not fathom say 20 years on... I guess it's that classical guitar training... And I'd guess he'd excel at any fretted strings.
Nice chap though. I seem to remember we did get a version of Captain Pugwash/Trumpet Hornpipe that worked as a one off in the bar.