I would highly recommend German Motorworks (GMW). I bought a 2007 Maserati Quattroporte GTS with the Duo-select F-1transmission and unfortunately it had a bad clutch which was surprising as it had only 7500 miles. I worked with Jonathan at GMW, and he walked me through the options explaining my choices punctiliously. I was able to make an informed decision as he presented me with 3 options on clutch types (fortunately I had superior/improved clutch materials to choose from that were much better than the stock 2007 clutch). Since the tyranny is a "manual" it takes getting use to when you initially drive the car. I was thrilled when I got the car back from GMW; the clutch was so smooth, and the car is now so fun to drive. I really love these guys at GMW. Do not hesitate to trust your vehicle with these folks. You won't be disappointed. Mike Cimorelli