not sure if it's wise to put a square top on the older straight spreader masts, apparently difficult to depower in higher winds, i mean when was the last time you saw a square top on a hobie 16?
Like that?
![[Linked Image]](http://www.whirlwindsails.com/h16_superr_03_web.jpg)
Nothing prevent a square top on a H16, but it is not legal for racing. If you crank the downhaul the mast is going to bend, even if it is an old alu stick.
