the pedal that I own ans started with.
I changed the bearing and dirve shaft, which I consider a really weak point on this pedal. I changed it once for a stock, that cost as much as a trick one, he lasted 1 year and a half, then I order the acd's.
I also changed the springs to heavier ones, so that I can lower the tension at the start of the motion, but get an extra power at the end.
the pedal come with an excentric came ,you can find a linear one for this exact pedal, the one that you will find on the speed cobra, not a huge fan.
the settings I have is a beate angle around 45°, and the chain on the came that realease the beater faster at the end of the movement, so that all the sensation of resistance of the footboard is at the end of the movement.