Yes chevron, the OC flying who decided that the T Bird needed more high alpha testing with stores at altitude. As mentioned in Gp Capt Hall's book by a contributor who was on the JCU instructors conversion course, that goes on about the fact that at the time the aircraft wasn't cleared to drop anything at low level (which is backed by JMC notes around that time). Have only browsed that book in Jarrods, BV, as the publisher was going to send me a copy and hasn't yet. Coggers has the last chapter and mentions the 40Kg landing after the dropper feed failure. Sure the tanks were blown off that time, vague memories that it was RCS, but could be wrong?