good friend recently did one, southdownsdouble thread if you want to search,
more than even getting the fitness in the tank before, its all about the psychological side--you will have to plan in the intervals of rest, small drinks stops, piss stops, points of significance along the way to tick off, waymarkers in time and space,
keep on top of yourself, anything is possible with right mental attitude
good luck
good friend recently did one, southdownsdouble thread if you want to search,
more than even getting the fitness in the tank before, its all about the psychological side--you will have to plan in the intervals of rest, small drinks stops, piss stops, points of significance along the way to tick off, waymarkers in time and space,
keep on top of yourself, anything is possible with right mental attitude
good luck