The record event in Belgium was organised by the MOB (monster owners of Belgium) as part of their annual September weekend get together.
I've personally attended their weekend event but sadly not the record one, the club take over the centre square of a small town and hundreds of bikes attend not all monsters but only monsters are allowed on the square other models of Ducati and other makes of bikes have to park around the town square, the pics that Albie posted are a wonderful reminder of their event.
Best of luck with your record attempt, let us know the result.
Geoff.