A7750: Rotors, and Fine Tuning Regulator Compatible (21.6k and 28.8k)?

[Archronos]

Hi The Zigmeister,

I have a 21.6k A7750 watch, and an identical one with a 28.8k A7750 in it.

Would you have any idea as to whether the rotors are compatible? Would I be able to switch them?

The 21.6k movement has a fine tuning regulator on it. Since (I believe) it is just decorative, do you think it would be difficult to move it to the 28.8k watch?

I'm sending them both out to be AR'd soon, and I'd like to have the pieces exchanged at the same time, but I'm unsure as to how difficult this will be.

Finally, the two of the chrono hands on the watch (the seconds, and the one at the six o'clock position) are slightly off. They reset to 1 instead of 0/60 for example. I'm assuming this is just a matter of having the hands taken off and put back on, and is not due to some problem with the movement (since they always reset to the same position).

Any guidance would be appreciated.