A couple of years ago I got round the Brimstone 600 calendar event on a 67" fixed. Full commitment was required and was helped by good controls, good weather, and being in an excellent group which formed in the night and rode all the second day together.
To do a 1,000km of this, solo, less than perfect weather, no proper sleep stop...Top stuff Jonah and well done!
I would be interested if a calendar event of this ran in future