Scooby,

My 2000 I-17 aluminum mast boat has a mast rotation device as stock equipment.

Are we talkng about the same thing?

There is a stainless 'arm'( pointing aft) about 12 inches long attached to the mast about 4 inches above the boom attachment.

Then the pulley system and line, that adjusts the whole deal, attaches to the aft point of the rotator arm, to pulleys on the boom,..then the line goes down to tne tramp,..under the tranp,..to exit at cleats port and starboard..just aft of the side shrouds..

..you do not have this set up stock?

regards,

Bruce
I-17
( on the beach at Tampa )