I have the EC model. I'm sportin 107 kg without gear. riding level, say intermediate amateur. In the amatuer races here in sweden i usually end up in the middle of the results. I ride for fun and exercise.
The conclusion of spring rate beeing wrong was based on that it felt almost ok going uphill and absolutely terrible in steeper downhills. also the the race-tech spring rate calculator for all the bikes I tried using it for recommended ~4.9 N/mm.
So front are now 5.0 N/mm, rear 60 N/mm. Funny thing was, that with the front springs too soft I could hardly feel what was happening in the rear. Now I can feel a change with two clicks on rebound.
With the fornt springs at 4.5 N/mm, my hands were so badly hammered it took out all the fun in riding.