He has a number of different stages of tune, it all depends on what you are gong to use the gun for. He used some of my guns for R&D and I have Pocket Police that's as slick as a 1950's S&W and a Walker with the shallow oval slots that'll lock up tighter than a bank vault no matter how fast you cock the gun. He said that I could fan them though I would never do that. As a minimum I would recommend the "Rented Mule" + the coil hand spring.
http://www.goonsgunworks.com/services
http://www.goonsgunworks.com/services
