I didn't see anyone else fixed, no bromptons or moultons either. Did see a couple of handcycles and a couple of tandems though, which cheered me up as did the guy on what I guess was a mtb/gravel bike with super wide bars. If you saw someone who looked like this, you saw me.
I stopped briefly to change water bottle positions, as my seatpost bottle cage position was a bit awkward, and 5 minutes or so at Box Hill drink station.
Just électrolyte tabs and food to buy, stingy on freebies today...
Might have seen you, not many fixed riders out from what I could see, saw someone with silly big ring and small sprocket, could have been 48/15.
Yeah, did it on gears, think my riding time was 4:20 or so, took a short break after Box Hill to refill water and have a stern word with myself.