You should all run it barefoot.
I can't make it this weekend as am doing a brick session around my way with a few others who are doing the Ballbuster with me.
Anyhow, today I ran 10km this morning before work and concentrated on vigorous arm movement and looking ahead a lot more rather than down. What I noticed was the looking ahead seemed to put the body in a better position as seemed to speed up as with moving the arms nice and fast. I don't think you should lean forward so much Sylv, have a read of the Gordon Pirie thing he is very adamant about not leaning forward. So on the 10km to work I wore my normal non cut down trainers and they did feel heavy and quite difficult to hold the forefoot strike. Did it for some of the way and then soft landed on the rear a bit as calves were starting to ache.
Then this evening did 2km in the cut down shoes, man it is so much easier to run without the heel, I really noticed it again that landing on the forefoot was easy and natural and that combined with the arms and faster cadence I was going nice and quick.
Calves feel absolutely cream krackered now, but no pain no gain. Might do another 10km tomorrow morning am enjoying it so much.
Cheers
Marek......