So sorry about your friend. But a great tribute to incorporate parts of his work in yours!
The intertanks for the LWTs, which was first used on STS-6 were different from the intertanks used for the SLWTs. For one, the SRB thrust panels were completely smooth, they didn't have the stringer valleys that were used on the SLWTs. Also, the I/Ts were equipped with two Shuttle Range Safety System (SRSS) antennas located 180°s apart. The +Z SRSS antenna can be seen to the left in the second attached photo, to the left of the +Z aerovent.