You can check it for pressure and if it's straight but you can't check it at a molecular level. A spring only springs so many times and progressively loses its memory. That memory is not necessarily just pressure but can also be speed. Valvesprings are junk before the rings in the piston.
molecular level? You can check your springs at the 2 spec points and if they are in spec you are good. you are not going to see a speed degredation without a height/pressure change as well. Yes, they do loose form due to memory but again, you would see the pressure change at that point.
I just got some pictures, hopfully they work, ill give them a try.
Just a friendly FYI, but your lower a arms are on the wrong side of your quad. I can't tell if the top ones are. I'd have to see a picture from above the arms.I can tell by looking that those are Herrmann racing arms. I bet it handles like a dream. HAha You might want to fix that.