Invicta59 - I've just seen that you're in The Slingshots! Sheffield legends. I think you know Chip (Mercurys, Radiacs, etc)? I used to be in a band with him, think I've seen you crop up on his Facebook.
Interested to know which luthier you go to, I only know one round Sheffield. I spoke to Geoff in Ecclesfield who's done my setups in the past and he gave me a really detailed quote. Obviously, suggested I'd probably be insane to do it, but at least I know where I stand. (Should anyone reading this post in future want to know the costs involved, message me and I'll let you have an idea).
The horror on Mrs Andybass's face at the suggesiton of two double basses in the house, however, means I may just resize my bridge and put some Velvet Garbos or something on as a better all-rounder (I use a Rockabilly E and Golden Slaps A-G, which slap and pizz pretty good but sound pretty grim bowed and lack some volume).
I'm currently playing in a couple of bluegrass things, one band that's just started and is more this modern grassy-country stuff and another old-time duo, due to start gigging very soon. Other than that I play for M&J Blues sometimes and, well, anyone else who wants a double bass when you, Chip and everyone else is busy!