Hi Phil,
Well let me tell you how I do it, in my mind

And the reason I say this is because some of the slomo analysis of my stroke has surprised me!
So on a distance cast I’m “leading with the butt”/ “dragging” the rod/ translating the rod with little rotation at the beginning and for much of the stroke. On the backcast the rod butt is tucked under the forearm for as long as possible until it naturally flips open. On the forward cast I imagine I am reaching out and hooking the rod butt over and around a tree miles off in the distance at about 15 degrees above the horizontal.
So that’s the distance stroke. The haul (the dramatic part/rapid acceleration phase) begins when I see the rod butt passing the perpendicular. Both back and forward. And then it’s explosive. BANG!!
Now there are variations to this. I have different ways of applying the force to the rod (typically pullback on backcast, some thrust on forward). I also can haul a fraction later. And often do.
It’s also possible to haul too late, or indeed not at all, but the biggest fault in advanced distance casting IMO is “hitting it too early”. That’s my biggest fault too.
I don’t know if it’s truly possible to have separate explosive timings of rod rotation and haul. It’s been mentioned a few times in the physics thread and it’s something I will attempt to play with on this current moonless casting session with the lumiline - assuming it stops raining at night.
But that’s basically how I do it. Pass the perpendicular and hit the barstool. I go: look at back target, hit it, check loop, look at front target, hit it, check loop and so on. Easy adjustments are to change the “hit” timing. It’s difficult at first because we have some many things to think about but the more we do it the less we have to think about. I’m sure you’re finding this. The overriding element to the stroke is that it absolutely must be straight. If that’s not in place then nothing is going to work well

I’m guessing you’re throwing pretty straight now – you need to be regularly checking this. As In 2-3 times every casting session (check your targets align, drop the line between back and forward casts, check your hand path and body alignment).
It’s possible to play with timing in slow motion. Lay the line on the ground between strokes, do everything at half speed up until the hit, then be explosive. You can play with timing this way.
Cheers!
Paul