Thanks for all your positive comments; I'm really converted to 5 strings and don't play the 4's as much as I should. At one point I thought about selling them, but, as you probably know they're hard to part with.
The Bassman 100 Head is a 76/77 and i bought it from Mansons (I have a 64 Blackface 50 as well) and the cabinet was made by Torres, although the Fender logo was added by myself. It's not a loud rig but has a great tone. I'm considering getting another cabinet and running the 100 and 50 together!
Cheers
Charla