I thought Hendrix just played left-handed...I didn't know he played upside down.

And don't worry about your fingertips. Play frequently enough and they'll grow calluses and you'll be able to carry frighteningly hot plates balanced over-the-shoulder waiter-style in your left hand! Always a fun party trick. =D

Uh, thanks...I'm not actually worried. I've been playing off and on for 12 years, I know all about the callouses. I just don't have them back 100% yet.