Are your brake mounts welded in the wrong place? my t-rexc is the same, (but not with the mondo gap on one side)
Do you mean, One piston is set up perfect, not to far in, to far out, set up 100% perfect, and the other side has to be in all the way?
If so i have the same problem(well not a problem but just annoying). You coloud over-fill the system? might work ?
Cheers
Tom