Thanks for the comments folks!
The polysynth that jumps in with the chords at 1:30 is a fairly simply tweek of one of the brass presets - I started with 0110 "On Jupiter" and then just sharpened up the attack a little. The performance is based around a multi, with a voice change in one slot (one of the sequenced lines) and three voice changes in another slot (the lead voices).
Your request to post the programs is a timely reminder to me to back up all my programs. I'll get that done ASAP and then figure out how to pull out the specific progs and post them here...
I think it's really a tribute to this synth that it can sound so rich with no overdubs!