I did the 400 k qualifier for PBP on saturday. Had a stomach that was not quite OK but it went quite well none the less. We used a little over 16 hours. We have one really good rider in our group who wants me to tag along and do the 600 nonstop. I'll see how I feel halfway through. For him the 400 mostly was a zone 1-ride even though he was up front pulling for a large part of the ride. It might in fact be easier to stay with him the whole 600 rather than resting and going with riders more my own strength. I am still a little sore and tired now monday morning so I do not really see my self going another 800 k but I will make my PBP-desicion after the 600.