maybe we should list common specs and come up with one design for the 450b like the barrel diameter, bore size, and find out if he can put wrench flats on it.
For example: The barrel diameter is 0.740, but a crush washer is 0.800 so If we want this to be used with a crush washer I think it should taper to just a bit bigger than a crush washer like the izzy brake.
Also, if it's gonna be used with a crush washer we need to come up with a spec that it times to about 9 or 10 o-clock hand tight so that it can then be snugged up with a wrench.
Ross, can you mill wrench flats on them?