The rule isn't so clear. It's being discussed right now in this thread:
http://www.chiefdelphi.com/forums/sh...threadid=31983
I guess you could argue that a PCB is only wire and solder, so it doesn't count as an electrical component, but i can't really think of any electrical component that
isn't just wire and solder when it comes down to it. I had thought that a custom PCB would be illegal.