If you want a cheap exciting way to turbo your 16 try this. Use an old windsurfer mast for the pole. Make it 3.5 mt long. Get youreslf an old style F18 21 mt kite with luff length 8.5 meters. It will be very fast and easy to control. Use the holes for the front trap in the tramp to mount the spinny sheet ratchet blocks and then a pulley on the front beam to give friction on the ratchet. I use that configuration for years as a single hander. Faster than nearly every other boat downwind!