Oh man, I've totally done that (and regretted it).

Wait, that's not how notary stamps work though.

Ugh, that's the worst feeling. I've been burned by those "universal" claims before too. In my experience, you're way better off sticking with brands that only make stuff for real machine tools, like Hardinge or Lyndex. Their R8 collets cost more but they actually fit right every single time.

Mason's point about name recognition is key, like did you get any calls from people who just remembered your business later? I mean the real test is if those new clients stick around and cover the ad cost over time, not just right away. Maybe compare that to what you'd expect from a Facebook campaign with the same budget.

It's the law of pet projects. The more you try to make something nice for them, the more likely it is to cause a minor disaster.