EffBie

I might be missing somethong here, but after playing many games with several custom races, I end up with masses of ship designs. They are hidden. When I am in a game and want to get my customised "Fighter III" what techs do I research? Redundant designs clog up the ship list but it is necessary to be in a game and to have to have researched the appropriate techs for the redundant ships to become accessible. (I don't mess with game files!) <br/