you're making it sound like some sort of niche ss event!
with in excess of 6,000 ft of climbing I would welcome any rider and encourage them to use which ever bike they feel would best get them around other than with a motor. Myself, knowing the route, I will be wanting a light hardtail with as many gears as I can get on it to pre ride the course. I would however not recommend the event if you want to ride a V10.
Once we can announce the details you can see it will not be niche but will be a very unique experience that is the culmination of 20 years understanding of running mtb events in all disciplines.