So, how close is too close when it comes to copying? In guitars we seem to accept 100% with the exception of the headstock logo. Why do we feel differently about other products? For example the cable testers from the original thread:

http://www.musiciansfriend.com/search.jsp?sB=r&Ntt=cable+tester


Why is it wrong for Berhinger to copy the form of a competitor, and acceptable practice for Hamer and the host of other guitar manufactuers?

How many guitars are copies of the original Teles and Strats? How about the Gibson SG, or Les Paul?