Your memory serves you right! It was indeed Sydney Supanova 2003!
Holy crap... has it been 10 years already?!?
We had several toys on display. They were:
+ Toy cast of our exclusive comic "On Devil's Ground" (e.g. Road Rage, Crosscut, Venom etc.)
+ "Death of Optimus Prime" diorama
+ Beast Wars battle scene diorama
+ Brave Maximus (in robot mode standing at the front corner of our booth)
I got JafCon black G1 Optimus Prime back in 2000, which was nothing more than a black Optimus Prime (albeit a rather nice looking metallic black). But it was packaged in the exact same box as the regular reissue at the time; same tech specs etc. So I decided to repurpose this toy as "Matrix Death Convoy," and set up this diorama. Even now I still consider this toy as that (thus it's resides on my 1986 Autobot shelf, and not my 1984 Autobot shelf).
Alas I don't have any photos of the Beast Wars diorama which is a shame. One thing we did was to give Rhinox two chain weapons, and we also used a bit of blu-tac to attach the buzzsaws onto the front of the guns to make them look more like the mini-guns that he uses in the cartoon.We also used some twist ties to make Airazor look like she was flying IIRC. We also used a rubber band to attach the Matrix onto Hot Rod's body (positioned in the middle, then we just posed his hands on either side). Optimus Prime's 'deathbed' is actually my old VHS copy of Transformers The Movie with the jacket insert removed (an ironic touch).
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