Lift off: Pulling knees up to keep feet closer to your backside

So you you start your jump back, you've engaged your bandahs pulled your knees up to your chest and tucked your crossed ankles as close to your behind as you can. You press down, lift up, all is going so well, but as soon as you try to bring your legs through the front foot just hits the floor.
This is always happening to me and as much as I try to keep my feet up higher or tucked in they just seem to drop and drag and hold me back. But I think I might have come across something that helps. Instead of focusing on your feet and ankles try focusing on your knees and of lifting them up. This morning I'd read something on Mysore musings about another posture and pointing the knees up which got me thinking. During my morning practice I focused on my knees instead of my ankles. I'd lift up and just before I began to throw myself forward and try to swing my feet back and through I focused on my knees and of keeping them up and even lifting them higher. For some reason it seems to work, there's an extra bit of lift and your feet stay closer to your backside helping you get through.