Matt,
Would I be correct in saying that the cost of materials that caused the decision to cease the 20's production is more so in parts like the beams, mast, sails and etc. rather than the fiberglass production itself?
One of the reasons Vanguard is so sucessful is that many parts are shared (ie. the 420, V15, FJ share mast and boom extrusions and the Laser, Pico, Zuma, Sunfish and etc. do as well.) This brings the materials cost down. While Hobie has to buy different parts for all their boats.

Also, best selling small boat in the world? How many Adventure Islands are you selling?
-Todd