The pictures above are of a modified Nacra Mast Rotation Device. The stock device was taken to the welder after it had broken at one of the weld joints of the round, curved, strut which is attached at each end near the open end of the rotator. He rewelded the strut and then welded two small, thin, stainless steel plates in the corners formed where the strut attaches to the rotator. (The plates already had holes in them. The holes serve no purpose, but I'm sure that I will think of one.) It is expected that the plates will help to spread the load and prevent another break. It is interesting to note that the rotator support strut weld failed in light air, sloppy seas.  Welding was performed by  ACORE WELDING CORPORATION, 126 Quality Plaza, Hicksville, N.Y., 11801. Give John a call at 516-932-6219 if you have any questions.