Do yourself a favor, google "EF86 tube preamp pedal", and note how many different manufacturers make them. As stated before in this thread, "N.O." is not the first to "invent" the concept of the EF86 pedal, and I'm sure some part of his pcb design was influenced by someone else's pcb that had been done prior to the "invention" of the Edison. Depending on how far down the rabbit hole you'd like to take this, perhaps Paul Eisler, who invented printed circuit boards in 1936, should be sending out nasty letters to anyone who bought a product built around a PCB?
I'm sure there are tons of EF86 or 806 pedals. The line is where is it described as a clone of an existing pedal.
We (Southampton Pedals) cloned the long dead Designer Submarine. But it wasn't in production and was impossible to find and we tried to find the original designer to give him a cut , and when we couldn't we donated money to charity.
Cloning any existing pedal is an ethical issue. Especially small builders that have small margins to begin with.
I'm all for expanding on designs or cloning pedals that don't exist, but cloning a current production pedal is questionable.
