Yea, for a blitz a spring kit/zero system is a good upgrade. Look into high flow valves also.
Azodin: Green Kaos...Blue ZII...
Green and Silver KDII
Green and Purple Blitz Evo
Capt. American Blitz Evo
w/ matching zero
DP: Green G4...Green F8
LOOKING FOR A BLUE AZODIN ZENITH...PM ME