Is it possible to adjust the stroke length of the KF2 spring, or must I always use 100% of the nominal stroke ±0.5 mm?

KF2 - Adjusted Stroke Lengths
There are two versions of the KF2 Controllable Gas Spring, the standard model KF2 and an adjustable model KF2-A. For more information on the adjustable model, see Technical Data 10.5/2 (Chapter 10 in the main KALLER Catalog).