This is interesting. Never knew they had a foot pedal as well. I guess most people, including Brian, mainly went for the Disco Tom sound. I regret at least not trying to buy Brian's original quad set when he sold them about 20 years ago! I know Brian wasn't keen on them and probably couldn't wait to get rid of them! But I liked that sound... and it's clear that they were capable of so much more.
https://www.youtube.com/watch?v=NC8aWBKrkPg
https://www.youtube.com/watch?v=o2RGHYtydQk
Brian did, of course, also use one of these...
https://www.youtube.com/watch?v=rxIEp7DNApU
And after a couple of years, Brian ditched the Syndrums and Synare and started using Pearl Syncussion electronic drums.
https://www.youtube.com/watch?v=__7HyZkuKHg