The rotation is no big problem since the exit point is so close to the rotation point of the mast and that the block svivels around the mast base. In the gybes you might have to help the rotation a bit to get it fully rotated.

I added a picture on the wepage with the mast rotated.

My biggest problem is to stop the spi sheets from dragging in the water when going upwind, you can of course make a knot to tighten them but that takes time....

/hakan