Wow, a C extender, that's a blast from the past. I remember seeing them, but I was kind of young then - do they stay in tune alright? How do you like the G & L by the way? Haven't really played with those too much either. I guess I found a few basses that I like, and I just stick with them. I'd be curious to see how the five string upright sounds too. I had a friend who used to play a 6 string upright and it was an interesting instrument. I'll have to check out that site, thanks for the link!