I see the Shadow has now retrofitted a larger spinnaker and spin pole configuration and adopted it as the class standard. At 102kgs, 4.8m length and 2.4m beam, 13m main and 13.5m spinny it is so similar to the F16's that the only real difference is the smaller spinny.

Have alook at http://www.shadowsailing.org.uk/the_boat_x.htm
It would be interesting to see if the mast is included in the mainsail measurement as upwind they were certainly pretty equally matched to any of the current F16's.

Build quality is stunning and lots of very innovative ideas when they were first launched back in 02