Hello newbie here and really interested in getting a fuller sound from a uke. This leads me to a tenor or a baritone. I've seen a 3rd metal string "c" on what I thought was a tenor. But I went to my local string shop and all the tenors they had had nylon strings. I cam really confused. please help? Ive heard lowG string but I don't think this is what i was looking at. I'm almost positive it was the c that was a metal and that i was playing a tenor Ohana tk20. Much thx in advance.