Demand ,da board front head shock absorber front

Hello, I’m going to change my feather legs in front and I just have a little trailer. New feather legs , springs , dome bearings , feather plates made of rubber , nuts and dust protection caps I already have. I want to assemble the new dampers first in peace and then practically exchange them. But a part is missing , I can’t remember it anymore. Had changed cathedral bearings and counterpart years ago and there was something else. Can there still a distance disc missing or a rubber ring??? The more I change with Skandix and PP have a link with image http://ingoft.lima-city.de/V70R/Puzzle_alt.JPG or that: http://www.skandix.de/…/ Greeting Christian