'01 GSR:
Thanks for the feedback.
My Mak friend found the guy's website, and then did an extensive search over on one of the Mak boards for comments, concerns, complaints, etc.
Apparently the guy does do pretty good work - generalizing from the comments - but his turn-around time sucks, at least from customers who were led by the guy's statements to expect much shorter periods for completion of the "package" Mak-work. Yes, the problem is/was apparently health-related. Some on the Mak board were still waiting for their guns, a bit fearful of how they're going to get them back if he dies suddenly with X number of guns in his shop in various stages of completion. Apparently he's not real good at returning e-mails or phone messages.
Anyway, for now, my friend has decided to hold off, although he's still interested in a trigger job and better sights. He really likes this little gun.