has 24 years experience working on Zs, and is beyond competent. He only has one employee (Seb), and is as selective about who works for him as he is about his work,(even though Seb frequently has been seen buggering local barnyard animals). Problem is you'll have a wait, so call and get in line. I have heard (first hand) horror stories in regards to Stillen, I'm sure there are satisfied customers out there but I would avoid them like the plague. You may want to call Scott performance and get an estimate from them and then compare their prices and customer service to Greg's (SpecialtyZ). I know of no dissatisfied customers of SpecialtyZ. Distance from you is however far you are from Los Angeles (he's just northwest of downtown L.A.). Good luck, Mark