Not coming all the way down to set idle

I can almost guarantee you that the 24 initial is the root of all evil. but you have made it work so it's hard to argue with positive results.

But I can't help myself;
If, I say IF; somebody was to reduce your initial to something like 18, and then bring the mechanical in to start at 1000, then as soon as the engine comes off idle, the curve would start to come in and Ima thinking by around 1800 you would have the same timing as before the reduction. This would allow you to open up the butterflies, to maintain the idle speed that you lost with the reduced idle advance.This would of course put the t-blades a little further up the transfers and so would require a small reduction in fuel from the idle circuit.
The result of all this is;
1) a little less pump-shot required to overcome the dead transfers, and
2) a tougher bad-boy idle, and
3) the ability to bring in the Vcan a little earlier,a little faster,and possibly a little more of it. And a little more of it, makes less-jumpy slow-speed operation, and a smoother cruise, in second/third, and more mpgs on the highway, in top gear, and
4) if you have that fancy A-500 with a 2400plusTC, none of this matters. :)
5) much