What custom makers are worrying about this? I keep reading comments about "custom makers" quaking in their shoes but I don't recall hearing from any who have anything negative to say. IMHO, if there are "custom makers" who are legitimately threatened by this, they probably have a number of other issues to worry about. Maybe worried "custom makers" should embrace the capitalist spirit of the US while they still can and try to one-up what Jim is doing, or perhaps create a more "custom" niche for themselves that will always remain in demand.
I will always admire anyone who builds a successful business for themselves. That's what the US is all about. Or should be.