sdg seatposts

For those who might be thinking of falling into this trap let me warn
you .
I got a Dahon with a special seatpost by SDG.Dahon are fond of these
..They are light , but only fit special saddles made for them.There are
now a number of saddles available, but all are expensive and none meet
the problem of personal preference for a particular type, especially if
you like brooks.If they ever do a brooks it will top 100gbp.
Now I have stripped a thread on the saddle clamp.The importers say NO
SPARE PARTS are available and it will need a new post.I have been able
to cope with a bolt and nut from the bits box, but there is no way I
would consider getting one of these gadgets again.
The Dahon fora are full of people with the same view, but they continue
to be fitted by Dahon.
Avoid them.
TerryJ