I am doing this (unless it's wet), but only for the 56mls. bit as I've got to ride in (and out) from Westbury, Wilts. so it'll be about 100 for me. Could do with company on the ride so I don't have to carry a lock, and keep having to use it I avg 14.3 now for 50mls. but don't what I'll be able to average for the 100 total I'll be doing that day.