Let me know if I have got this right: (Assuming a schooner rig, two mains no foresail)

As the HP is symmetrical there is a challenge of compensating for a moving CE (Center of Effort). i.e. when shunting the CE which is aft of the center flips over to the other side. If the dagger boards are both equally down the CLR will be in the center. This may leave a larger gap between the CE and CLR, which would result in weather helm and push the nose into the wind… which is why after a shunt you would sheet the fore main sail in first, wait to pick up enough speed for the rudders to bite, then sheet the aft main in and counter a bit with the rudders. It seems constantly fighting the weather helm with the rudders would compromise performance a little though.

Alternatively, you can move the CE aft, the dagger boards could be individually adjusted. I.e. after a shunt the fore dagger lifted and the aft lowed some moving the CLR back to just ahead of the CE and thereby balance the boat.  

Questions:

=>Moving the CE: Seems like quite a bit of effort to raise and lower the dagger boards on each shunt. Has anyone figured a system with lines running back to the helm station to make this easier to balance the boat? Most cats worth their salt have boards and a system for this.

=>Is a more central CLR possible? This seems like a much bigger challenge to solve. Did see a video of one large proa with a movable mast base, really doesn’t seem like a practical idea given mast loads etc.

=>If the most practical approach is moving the CE back with the boards, closer to the CLR for balance, are there disadvantages to having both CLR and CE far back, a longer nose…?