...Wha?
Yeah, the placement is horribly tricky at best. I tend to use the fusion charge to help with precision, but it's possible to catch it while running, though that happens to be riskier. I did post a Youtube video of the skip in action, and the link in my previous post has a diagram for the exact position of the invisible ledge. On top of that, I think it's also dependent on Musashi's feet. I've noticed that when I successfully pull it off, a bit of dust will pop out under his right foot as he's falling. But that being said, I've also seen that happen with the failed attempts.