I have had a chance to detune to Eb a couple of basses and I'm really liking the feel. One has to be careful not to get a bit sloppy with the technique but aside from that it's just a slightly faster, easier experience to standard tuning. I had to tweak the truss rods a bit as well but no big deal. I use DR Lo-rider 45 - 105 strings and certainly would not want to do this with any lighter gauge. I am no longer at all concerned with my jam coming up at the week-end. Thanks for all the useful help guys. Bob