Probably never 
once we get comfy with operation then its time to turn to development which is never ending! I found a data sheet for the RXB6 and grabbed a copy of rf-link. I can see why he is having problems that is one odd part (I don't think its odd right though, just odd). The PCB layout is indeed offset by a bit (not a sensible bit like .05 in as far as I can see but some odd offset which may or may not match the original real part) and only some of the connector pins seem to exist. I'm practicing my parts creation by trying to make him a working copy. I think I'm finished the svgs so its on to the fpz and see if it works tomorrow.
Peter Van Epp