New 30 luger built up

[Diver6106]

I believe there are two different springs for the P-08. One for 9mm and one for 30 cal. Might you have a 9mm spring? Also is there an expert who knows what the old craftsmen did to tune up a Luger, besides cleaning and oiling it? Did they cut out loops in the spring or replace it with a less powerful one? That seems to be the primary balancing point for recoil & ejection.