All of our systems come fully programmed (RPM, start delay, flight time and RPM increase during maneuvers <gain>). All you have to do is to mount the components on your model, charge the battery, plug the battery into the ESC, flip the switch and fly. There is nothing else you need to do. You can, of course, change any of the programed settings and there are full instructions included for how to do this. The "systems" have been designed for individuals who either do not know how to work with electronic components or who do not want to work with them. I set them up based on the fact that although I fly my IC engines and they are all competition tuned I do not want to have to do the engine work myself. I would rather have someone else who knows what they are doing complete the competition tuning for me.
The difference in the systems shown on our web site is that one is a "SPORT" system and the other is a "COMPETITION" system. The big difference comes in the area of the motor. While both motors are very good units the competition (Hacker brand) motors have better magnets and bearings, tighter windings and closer tolerances than the "sport" motors.
For your S1 the RSM25 System will work great!
Regards
Eric Rule