Mast Splice Location

[GlenM]

Before hurricane Ike I had a 45' Isomat NG-70 mast. It broke at the spreaders that were welded on. The bottom half of the mast is to damaged to be used from contact with the marinas travel lift. The top half including the mast head and all hardware are in good conditon. I am considering a splice. I have found some NG-70 extrusion and an internal sleeve custom made for it.

Should I put the splice where it is broken? (after cutting out damaged area the joint seam will be about 10 inches above where the spreaders are located). The spreader bases will be fastened into the lower part of the sleeve material.

Or should I go up higher on the mast with the splice? If so how much past the spreaders?

Mast load challenged here.
Thanks
Glen