Paul: Glad you're happy with it, you did the work anyway
TSM: As I understand it the smaller the airgap the greater the compression ratio of the air at the end of the travel. This means a smaller airgap should provide a greater "air spring" effect at the very end of their travel, but if you go too far you can end up with all sorts of issues. Remember that the oil level is measured before you add springs, spacers, washers and caps, all of which use up some of that airgap.
Please feel free to correct the above
