I have a Coticule 1 3/4 to 2 1/4 in large and 4 1/2 long. Now I am going to buy a second stone: a BBW.
Since I work well with my coticule, is 1 1/8 x 4 a good dimension for the BBW? The next step would be 7 3/4 x 2. I think I will use the BBW to settle bevels on ebay razors too, since I have no low grit stones. In this case will the wider one help?

[I read around about similar questions, but a custom answer is welcome! eh!]
Thanks!