The seal I used is a seal from the tailgate of a Volvo 740 stationcar.

The gear i have rebuild myself because I didn't like the bungysystem.
The bushgear is wider but with te shipping costst to the Netherlands I found it to expensive so I made it myself.
If it works I don't know yet .
maybe i have to use other springs if they are not stiff enough or to strong.
we will see

Eric