No callus worth speaking of, but as you can see I've developed huge muscles in my clicking finger. :o). I was always told things fall off if you play with them too much. Not true. They just get bigger and bigger. :o).

Expert in computer code including, but not limited to, BTW; IIRC; IMHO; LMAO; BRB; OIC; ROFL; TTYL. Black belt in Google-fu.