Folks thanks, good idea about being able to repeat the information for the sake of adding an additional wire incase one of the instruments dies.
Trips up the mast
First trip up the mast with a large screwdriver found the old Stowe wind
sensor was fitted with large self tappers that had been in place for 20 years and just wouldn't move.
Second trip up the mast I was armed with an impact driver. Nope couldn't move the self tappers.
Third trip up the mast armed with an angle grinder. 30 seconds later old windy thing removed and new ST60 cable installed. Holes drilled and new ST60 lined up only to find the self tapping screws from Raymarine are made from chocolate and promptly rounded off. Ray even supply a drill so it was deffinately the right size hole rather than my error for once.
Fourth trip I bottled it due the wind strength and called a rigger. He wanted £150 ($225) and did I have a new topping lift
? Yes. Did I have a new spinnaker halyard
? yes. Did I replace the spinnaker
pulley block at the top of the mast? oh for gods sake
Fifth trip up the mast armed with new self tappers, job done, switched instruments on and prayed. Yippie it works