Also, Big S specced their tubing themselves, a deep dive will reveal some info but they used many suppliers, likely the ones they could strongarm into the cheapest price.

Several of the best framebuilders in the business worked for them and knew exactly what they wanted so were able to dictate that based on 100's of 1000's of frames being built.

They have some of the most well engineered and produced frames for numbers they were produced in.