Wow DG!!
What a great race report and a fantastic feat! I used to race cross country MTB and it's a lactate fest in comparison to road riding. I could see myself doing a 24 hour road time trial endurance event but I can't imagine MTBing for that long.
Simply amazing.
I'm still pondering your foot issues and I suspect they might be some mild systemic problem. I'll keep thinking about it. Otherwise are you feeling OK? Any ongoing signs of electrolyte imbalances or such?
Living life like there's no tomorrow.
http://gorgebikefitter.com/
2007 Look Dura Ace
2010 Custom Tonic cross with discs, SRAM
2012 Moots YBB 2 x 10 Shimano XTR
2014 Soma B-Side SS