Yup, have the Sportline Corse's, am over the moon with them.
http://www.autodelta.co.uk/catalog/p...roducts_id=576
You can see the external valves in the picture.
Actaully if somebody can tell me why external valve reservoirs are good I would be armed with another pub fact
I know they are often used in racecars.
I think it is something to do with more constant damping as fluid expands when the damper is under load but not sure how that works!
BTW the bound/rebound adjustments are coupled together, you can;t adjust rebound independently - possibly a good thing
If it turns out that you are seriously considering them I can advise on my experiences with their spring rates so you know what to order.
I can't really comment Vs the KWs since I have never used them, but Peter K was very happy with them I believe.
Cheers,
TB