I had a 5.5u with the over-rotator. As I recall, it was mounted as low as possible without the bolt actually going thru the mast base casting. There was a padeye on the front centreline of the mast about 8" above the rotator with a loop of 1/8" poly line running to both corners of the rotator to keep it from swinging down and hitting the crossbeam. The cleats were rotating bullseye cleats mounted about 18" out from the mast base on the main beam, using extended bases which put the the eyes about 4-5" aft of the centreline of the main beam. If you have the standard traveler cleating to the centre of the rear beam, it should be the same cleat on the same base.

As for the chute: It has to go out the sides, under the jib sheets, right? It doesn't launch over the front beam but over the juncture between the front beam and the hull? It shouldn't be a problem; the rotator gear is limited to the centre 2-3 feet of the main beam, and a line about 5" behind that. I ran a continuous line that only had a little slack, so I didn't have to be tending it all the time. I also did a distance race with the chute, and believe me, it's really nice not to have to mess with a jib! Of course, I then had to go and buy a Prindle 19...



Anyway, good luck. I'd shoot you a picture, but I don't have any, and the boat is sold now and a good 4 hours drive away