I had the same reservations as Peronel, that's a lot to manage over a weekend. I emailed them a few weeks ago, but disappointingly I've got nothing back so far. They have a shorter event next month, so I'll keep an eye out for reviews of that before deciding.
Quite worryingly they intent sending runners of the 7 Sisters and Beachy Head at the end of the race - could be fairly dangerous after 24 hours+ on the move, depending on the conditions. Centurion use the bridleway route to avoid this problem.
Quite like the idea of the 65 though, so hopefully it'll pan out.