Hi Brian

an interesting 14 project by a home builder ,
like the rig especially ,
http://www.rclandsailing.com/catamaran/index.html
a larger version with more of a windsurfer sail concept would be a great development , think of the range of full to flat sail shape such a rig could produce on a bendy CF lateen type mast ,-plus a spin off the taller A frame .
Picture it developed as more like a Sunfish rig , larger more verticle spar and a semi balanced boom ,
Little loads and an ability to cant the sail if attached to a traveler on the forward crossbeam ,--much like a windsurfer sail adjustment, canting to windward or leeward in light wind ,--the rig being raked back already .

The catyak 12 produced this type of rig decades earlier, though with fixed heavy alum tubes and fittings and rectangular type pontoon boat type hulls .

It is one way to get the mast -or-masts further aft on the cat and have the main more forward to balance the CE of the mainsail .
If the taller bi-pod rig was set say half way between the front and rear crossbeam ,-then the boom attached to the front crossbeam with a couple feet entended beyond -
{semi balanced } --that would place the masts aft -station 6 or more --and the ce -center of mainsail near the center of hull --CLR

As noted making the A frame rig out of more wing type section shape ,--or adding a small sail on the CF tubes would be an improvement and a good place to run halyards inside of
Wish him all the best on the maiden voyage this spring
.

http://www.rclandsailing.com/catamaran/index.html