I hope the OP took on the challenge of entering the 100km. I am unable to enter this year due to work commitments that I can't get out of (bummed).
This year would have made 4 years in a row doing the 100km singlespeed, rigid. It's one of my all time favourite rides. Every year I've gracefully come in last in my class, taking 7.5 to 8 ish hours to complete, cramping, tired and beat up with a huge grin and a sense of personal accomplishment every time. The convict 100 might not be the hardest, or best designed course out there, but what it lacks in those areas, it more than makes up for it in character. It's a majestic part of the world, with incredible views, fantastic technical sections, interesting rock formations and steeped in colonial heritage. The trail has spirit, and I'm going to miss being out there this year. Good luck to all who step up for the challenge this year, I hope to be back next year.
Ps, it's all about the 100.