Very low tech, but if you ever break a Wave Mast, we have broken two, here is the solution. Cut a 2 by 4 down to slip inside the mast, a section about 4ft long will do. Put in several screws, both top and bottom side of the repair. Then glass over the outside, making sure you retain the track for the plastic section. Lasted all year, so will repair others the same way in the future.

Caleb