That's really interesting, every so often, i will start thinking about earth shoes again, and ponder doing it, start practicing, and even the practice sessions scare me off! Then i'll bury the idea, and a few months later, i'll remember earth shoes, ponder do... it goes on and on!
there is a huge chasm between the material i'd do for friends casually and the material i'd do at a gig, but i'd love to be brave enough to do earth shoes, generally! Give your friend a pat on the back for me, will you!
C!