Note to self:
When you measure out a distance between two spots on the floor, REMEMBER TO ADD A COUPLE OF METRES for slack! And for the distance between the switch and the hole!
What a waste of time and money. Back to Jaycar I go to get 15 metres of ethernet cable instead of 10!
yeah, always apply the 2/3 rule
the straight line for cabling is about 2/3 of what you need to use to account for under/over etc 
Yep, and normally I do that, but for some stupid retarded reason I fucked up, and neither Crumpet or myself picked up on my idiocy.