Wooden A-cat plans have not been updated for some time now. Don't expect to either be competitive or as fast as an F18 or Tornado these days. Unicorn is a predessor of the A-cat with lower specs I believe; it weights more, I think I remember around 100 kg = 220 lbs.

If my momeory has served me right with regard to the specs than you may be better with a newer homebuild design; I'm thinking Blade F16.

In tests it has held its own against mark 3 and mark 4 Boyer A-cats (90's generation A-cats) as well as Taipan 4.9 cat rigged (comparable to 80's A-cat design). My intepretation of the test results are that the Blade stands a good change against flyers as well; but that is my intepretation of the test result. It is a given that the Blade beats Tigers, Nacra F18 and Capricorn F18's upwind when singlehanded. I know the unicorn is not capable of that anymore.

It may be worth investigating. I know of others in the US contemplating home-building one and we're going to help them.

Wouter