here you can see the nutted side of the rotator bolt

if you haven't already go to the below link and download the pdf nacra manual from about 1983? there is a full illustrated parts breakdown which should help on page 20

http://www.thebeachcats.com/index.p...temId=35436&g2_imageViewsIndex=1

if airborne still has his mast he might be willing to unbolt his rotator and bolt for you, i guess people looking for a mast will usually have busted theirs and will have the rest of the parts

if he IS willing to break it down and you DO have an old 5.2 you may also want the adjustable rake diamond wire spreaders