Sandy,

There is a mast diagram on the class website detailing track location from the mast butt up to bottom of track and topping lift block height(near spreaders) 

Hope this helps.  

Jeff 

I think a reasonable option if you don’t have a preexisting track for the spinnaker pole ring, a simple alternative would be to mount just a high ring and a lower ring. Although not nearly as critical as a track, I’ve seen other boats use it with great success (just decide at the set which height you want, can always change the ring if the conditions change). 

They are readily available and easy to mount. 

Rick Doerr

Platypus #1231