I race boats as well... CMB use to have the tooling and equipment and use to build all of Andy Browns motors until CMB stole the jig's and tooling... Andy has been in the process of setting up their own shop with the right equipment down in Florida and it has been nothing but stumbles through the entire process but I think he is finally set up and making product... last I heard .21 motors were a ways out.
The buggy motor he makes runs good, however I have only ran it on an A outboard, but his .21 boat motors are top notch... when you can get them.
Just a little input from my end.
Dave