I got mine refurbished by Cornering Force in November 2013, covered 6k miles and they started leaking out of both dampers, at the shaft seals a year later.
Simon took them back, tested them and refurbished them FOC. Fingers crossed this last a little longer this time, or it's time for a full make-over.
As a extra pre-caution, I have ordered some Twingo R1 dust covers for the extra added protection this time.
Check a post from
@MarcR showing the R1 dust covers fitted to the Sachs by BG.