dunno
Well, I not only make most of my own tools also build my own lathes as well, and I am not sure here that leaves me at the moment.
Having spent many years running a R&D machine shop. Innovation and change are second nature to me.I often take ideas or part thereof and see what improvements can be had and build my own
As for the Easy Rougher it would be one of the simplest tools to copy and so we see people doing so rightly or wrong.Its often about saving a buck and or the satisfaction of making your own.
As wood turners we make bowls,candle sticks, duck calls and you name it we have a go at it. We make our own lathe stands, tool-rests, vac chucks and as much of the accessories as we can. We are by nature 'makers of things' It comes with the territory so to speak.
Any manufacturer out there who believes other wise is most likely having himself on.Patents don't protect much when it all comes down to it.
But good marketing and pricing will always be a major challenge for all imitators to over come Thompson tools is a good example they are well marketed and well priced. I buy them, he just so good at what he does. Although I could make my own and pretty well copy his methods etc it ain't worth the effort.
neil
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The wooden Potter