Not feeling well, but got a couple of bits sorted - the MFD2 and PC RS232 feed from the SBC needed some form of termincation, I decided an old fashioned Din5 socket was a suitable solution and unlikely to get confused with anything else.
Also went back to the lower baffle ties - still not really happy with the solution, but will probably end up with the simple safety wire option - do need to get some .040 for it though.
