Hi Ryan. Spyderco registered the opening hole as their trademark so its not a patent thing. I paid and licensed to do the opening hole and I am above board on it was all was saying. Some folks see an opening hole in a custom folder and they immediately start this talk about how the maker is stealing intellectual property. I was just covering that base before it was asked. I'm sure most of my customers and folks that know me would never think this because they know I'd never do something like that but that statement was not directed at them.
In answer to your question though, yeah, I'm serious. I'm licensed by Spyderco to use their hole on my custom folders if I want to up to a certain number per year. All last year I made two folders total with opening holes in the blade instead of a thumb stud though so its not like I do it a lot.
STR