Connection here is slow so i can't lookup the springs you mention, the original xray springs to my knowledge (serpent type) were...
Pink: Soft
Orange: Medium
White: Hard
Yellow: Hardest
I changed to the xray springs and using the guide of spring rate in words medium, soft and hard, I then based my setup on this. Do not do this, i was given advice in these forums to stick the springs together compress them and find their = spring rates by which compressed equally.
I made a massive mistake in taking medium to be old style medium
quickly changed by doing that check 
I found light blue or white new to be near White serpent springs old for instance ! (I think)
(sorry if this is what the file shows mario) again connection too slow
But i couldn't find a spring rate for the old springs
Do you know them ?