My bike has enjoyed the Guhl reflash (good for low end), the SISF Evolution reflash (great improvement over Guhl), and most recently the Mountain Runner Premium reflash. Just spent a week in New Mexico and Colorado putting the MRP to the test and it was great, as attested to by many posts. And on top of improved performance, I also got at least 5 more miles per gallon. The only time I wished for The Hammer reflash was when passing cars on two-way highways. Which prompts the following question to SISF, reflasher extraordinaire - assuming it is possible, have you considered providing an option to install both the MRP and The Hammer in the same ECU, with one of them replacing the now useless ECO mode? I would buy that dual reflash in a flash.