Ok, I know there are probably a lot of similar posts, but I have a number of questions about 650b's that can hopefully be covered in one shot!

Firstly: how much larger than a 26" and smaller than a 700c are 650b's? And, how different are they in size to 650c's?

Nextly: I want to put some 650b's on a bridgestone mb3 mtb. I know this will work because of previous posts I've read where people have gotten 700's with fat tires to work in those frames... (I tried that and they do!). It sounds like using highly adjustable v or cantis will work with this set up, but I'm wondering if anyone has experience with this? Not specifically on the bridgestone, but just with 650b's on a standard MTB frame and how the brakes line up.

Lastly: what about putting 650b's on a cyclo cross frame? Will brakes with high adjust-ability work on smaller wheels in a bike built around 700c's?

I know you are wondering "Why?, why bother with all this?". Well, I'm small, I have short legs and a long torso. I like touring and running fat tires, and climbing with 700's is hard. Alternately I converted my MB3 into a touring setup with drop bars and slicks on the 26" wheels and the bike went from fitting to feeling TINY. I felt like an ant crawling across the ground. So... in my endless search for perfection with my bikes I'm thinking of trying 650's. Thanks for any feedback!