I have an Stg58 FAL built on a DSA receiver by ARS in 1998. Mark Graham (gunplumber) does very good work and I'm very happy with my FAL. However, he is very opinionated (some would say cocky) and can be "difficult" at times. His online behavior has driven a lot of folks to deal with other people like Mike Prewitt. Follow the discussion on FAL files for any length of time and you'll get a sense of what I'm talking about.
Understand also, that if you go the route Destructo6 is suggesting, you'll also want to factor in the cost of having Mike refinish it. The R1 parts kits, so I've heard, are in pretty rough shape.
[This message has been edited by pbash (edited February 12, 2000).]