We did go through Slack, yes, and there was a dayglo-orange Five in the group. Mightnot have been us that you saw though, at 2pm ish the fatbike was on the road up to Heptonstall from Hebden
we did midgehole, gibson mill, punch the wall, beechnuts, jack bridge climb, washing line, blue pig, a river runs through it, then lunch in hebden. After lunch I dibbed out as my back brake was sticky, the fatbike and the dayglo went up the road to Heptonstall and down Blue pig again, then played around on the bottom of Pecket Well. Nice day out and quite infested with the who's who of northern STW posters - at various times through the day I saw Hp_source, Ed Oxley, Dale, Mr Potatoehead, JustMe, Goatster, Grum, Chipps, Makepiece and Matt Letch.