I guess it depends on how many you plan to sell. If your just doing it for friends. I don't think you need to worry. If your planning on going into the business of selling kits I guess that would be another story. PM'ed you about this

There is a guy on ebay selling plans that aren't his, but he continues to do it anyway. So there is always the chance some hack will try to capitalize on your work. Then again is it alright to call it a Chaos or Kaos or some other already used name. I don't know about that.

Maybe that's why FK had different names for the glass planes that were close copies of the the MK Kits eg Blue Angel vs SBA