This is a little bit semantics and a little bit really important. When SW talks about "crushing the can" - or I've talked about going toe down - heal down, it's the heal down part that is really the trigger (specifically the heal weighting) for
bringing the disc forward not starting the pull.
Semantics can be important. Don't start the pull / aka the acceleration from the back of the backswing.
There's two very different ways that things can happen. You can start pulling at the depth's of your backswing, which I would argue is a very bad idea when you're working this stuff out... or you bring the disc forward / collapse it back to your power pocket.
Things are smooth, loose but still controlled... and the elbow leading with the hand on the outside will create the mechanism to accept your weight shifting into the braced front side.
remember, the acceleration happens in concert with the shoulder opening. Think of it as throwing with your front shoulder, but it has to happen out front.