Hi,

I have never tried shims under/between blue o-rings and neither have leaking experience.
however damper (mini big bore on 419 with low profile) gets air bubbles after couple of runs. Dampers are perfect after assembling...Any advise not to have so frequent?
I assemble it with zero rebound, drilled hole in the cap (I do the 1mm hole via center point of the cap way to up to the connector).

Thanks
Marton