I'm building a sailrig MK2 that will be mostly used on my glass Wilderness Systems Northstar tandem. I've got a nice modern windsurf rig that I'm going to use for the sail (full batten, mylar, carbon mast), its 6.5sqm. I cant decide if I can get away with an unstayed rig or not. If I go unstayed I'll probably use a 4-5'length of the biggest thick walled aluminum tubing I can fit in the mast as a mast base that would run to the bottom of the boat for the rig to slide over. Otherwise I'll use the stock rubber joint on the mast base and 3 stays. I'd prefer to use the unstayed rig because I'll be able to depower the sail be easing it beyond 90deg. But I'm worried about snapping the mast without stays. Anyone got any informed opinions out there???