Loose in the piston doesn't matter. It's how tight it fits the rear guide. As Blackmax says, Julian has exact replacement springs, but if you want a Maccari spring, just tell him what you're doing with it and he should be able to help.
Loose in the piston doesn't matter. It's how tight it fits the rear guide. As Blackmax says, Julian has exact replacement springs, but if you want a Maccari spring, just tell him what you're doing with it and he should be able to help.