Big Sioux saddlery - my hide is paper thin to, but is is ok to braid with - I think - I don't know - although I have never tried to braid in rawhide before.   
25b - Yes I did bevel it before I started braiding. 
I am very excited to work with rawhide. It is surprisingly different from leather. 
I know I have to practice a lot, but I'm looking forward to it. 
The only thing I don't like is the strange smell. Maybe I just have to get use to it.