$100? Will you build me five of them?

Seriously, though, I doubt lambert would be even slightly upset. They have a production engine, yours are just built for the challenge of it.
I think the Lambert is very reasonably priced for what it is, and from everything I have heard, they run great, and are a real practical, flyable powerplant.
Yours are handmade pieces of very interesting machinery, on a totally different level...but remember, to do what lambert does, make a design that is consistent and repeatable and saleable, that is a different challenge from yours, I respect what they have done, too.