Nice to see some of the complimentary remarks about the final FRS1 ie the Phase 1 Avionics update which included the I/A Blue Fox, 32K Weapon Computer, Digital ADC, MADGE (Head Up and Head Down), A NAVHARS that worked (it had the FIN 1064 'Jag' CPU) .The integration of I/A Blue Fox with the bigger WAC gave the FRS1 lots of goodies e.g DGS -a predictor Gun Sight which was used to good effect against the towed SAMDU (towed by A&AEE aircraft) for the gun trials (XZ 440 pilot Steve Thomas).
I was programme manager at BAe Dunsfold (1984-1987) for this thoroughly enjoyable Avionics Integration programme before I was 'hoiked' off to BAe Kingston in Dec 1987 to programme manage the build of the first FA2 -ZA 195and subsequently the 2nd FA2 XZ439.