Quoted from Taxman:
I guess we know how he wants to discuss the legalities of his product.
Mike doesn't have to and both him and Ben know this. Ben could spend $$$'s hiring lawyers but Mike could simply spend 6 months or so 'refining' the board design and software so it no longer resembles Pinheck. If Mike leaves the design and software as is, the best Ben can do is to take him to a US court and get a US import ban, which would be ineffective as Mike has stated time and time again he doesn't want to sell in the US.
This is why Ben has been trying to open up some kind of mediation (albeit through public naming and shaming) to which Mikes answer has been 'LOL IDGAF'.