Ron asks- >Why would you use this stuff when urethane is available?
Cost and availability are about the same, so maybe ease of working with it? One big factor that brought it into common usage on homebuilts was that it can be hotwired without generating toxic fumes like urethane foam, but there isn't much hotwiring on KRs. Of course the original KRs used urethane foam and the only squawk I've heard about it is that it is somewhat delicate. After you carefully sand a shape out of a block of urethane foam it's easy to ding it. Polystyrene is a little less delicate that way. Oscar Zuniga San Antonio, TX mailto: taildr...@hotmail.com website at http://www.flysquirrel.net
