I am friend of Mark Bartel and helped him a little with the "wire trees" that he custom molds. I made many suggestions along the lines: "Why don't you just..."

He constitutionally can't - he is the definition of uncompromising. I don't play guitar, but I want to buy one of his amps because of how it is made. Take a look at this:

https://guitar.com/wp-content/uploads/2018/11/bartel-amplifi...

And every one is exactly the same because he writes and then follows explicit directions for making every connection.