Originally Posted by fq06

Yeah, not sure the soft pink rear springs would work well with any piston but the fiorini pistons.
Green rear is the next step up and is what I was running with the Tekno 8x1.3/1.4 pistons matched with green front.
From what I can tell from the multitude of spring combos I've tried on this, if you keep about a 1.7 in/lb spread between the front & rear, your springs are balanced. From there just choose how stiff you want your setup.
Green springs had great balance... 1.7 spread. Now Durango white/black front spring and Tekno pink spring. Again, perfect balance and it happens to be a 1.7 in/lb spread.

Some people like a smaller spread giving more spring rate to the rear, but many have said that the greens gave very good flight and handling.