1 footed wheel walking

Hey guys, I was curious as to how you slide your foot during 1 footed wheel walking. Whenever I do it, the heel of my shoe gets caught in the knubs of my wheel and I fall. Is that because I’m kicking to far? Could someone post a video. I’ve already seen sp4rky-m4rky’s video, it just didn’t help me much. Though it did teach me wheel walking.
I could use the help

Tutorial

This one may be help, or maybe not, but it seems good to me. I am nowhere near being able to wheelwalk, but it is a dream…

Jerry

nubs? your tire is making it very difficult, get a freestyle uni

It is easier with a smooth tyre, but I learnt with a trials tyre. Just angle your foot backwards a bit more and try not to push too fast.