Oh, I know..

I thought you meant the clubby style lean back and pop over.
Even when I do the one you described the tail block is a good thing to wedge your foot back on.
It's hard to explain but I just got used to it and have just gone with it.. Newest board doesn't have one ATM but I have been thinking about it.
If you kinda roll it onto the rail when you push down you should get deeper. That's kinda the way you DD it.
I can't do it as good anymore, boards have more volume and it is more practice and technique then strength.
Most of the time I just go the roll option if I can't lean back and pop over the foam.
And the turn thing. It's a cheats method

the tail block gives you something to push against. If you know what I mean.