The B7/B70/B700 was specifically designed for thinline guitars (like the Casino) where the bridge mounts directly into the face of the guitar. The main plus of the B3 is that you dont need to drill into the guitar but I'm thinking there must be a reason why players tend to go with the B7. They'll always send it a little out now and again. Well as good as can be expected from a vibrato arm. I have one of these on my Gretsch as it came with it and it works just fine.
The B3 doesn't require drilling, which is a plus, and has no tension bar. Paul and George had one on their Casino's from the look of it and I've read that a lot of people prefer the tension bar as it gives more stable tuning etc. It also seems to be the more popular choice. The B7 requires drilling I know and has the tension bar. Have any of you guys had any experience in putting a Bigsby on a Casino and which one works best? I know either a B3 or a B7 works on it.
I'll have my guitar guy do it as I wouldn't trust myself with it. I'm also gonna be ordering a Bigsby to get fitted onto it as I've gotten quite used to having one on my Gretsch and have incorporated it into some songs and now need one to get through a whole set. So I've decided on getting an Epiphone Elitist Casino in Vintage Sunburst.
