Ray is making progress with the rigs for the Octave prototype.
The design uses a simple method for cantilevering the cranes from the upper mast tubes.

After drilling, fitting, and bonding, carbon tow is used to prevent splitting.

The mastheads are filled with low density filler mainly to keep water out.

This system eliminates all fittings from this area where weight is critical.In a similar manner, the mast/yard junction is done with some 16mm tube.
The 14mm mast tube passes through the 16mm horizontal joiner. Carbon tow binds the junction together.
Main yard and jib yard plug into the 16mm tube then step down to 12mm and 10mm.