well the eject button didn't work and after a trip to pecky we were unable to unpair the 2nd unit
but he has a plan lol
for me to take the 1st set back so it can be unpaired then he will copy the info from the screen that would show as ""delivery mode"" then upload that info to the 2nd screen thus enabling the screen to be paired to the headunit and cdc3
ive also found some info on converting the cdc3 ""TA" to a ""TB"" the units are from what it says are 100% identical and the info on the eeprom is all that differs
so with the above planned when the 2nd set is all unpaired i will get pecky to change the info in the spare astras original cdc3 eeprom so it can all be paired as a set to the cid and ncdr1100 with the ncdr2013 front mobo installed
i did pop back to the scrap yard where the ncdr2013 came from and found the front and the wires for the screen i needed and also a gps aerial base
still plenty of work to mess about with getting these units in and working