I've never been able to get the timing down with pumping and doing a trick off the lip. My fingers just don't have the precision necessary.
I was having a serious case of "oh crap I landed the grind, now what", as well.
For what it's worth, the methods are less glaring than pushing mongo in a pool. Regardless of how you're pushing, you don't need to push in a pool to begin with, you'll get plenty of speed pumping transitions (more speed than from pushing).