Yes, the pre-load adjuster has a "set" screw. USA talk, or maybe redneck talk.
I have not got to my optimal setting yet, so the set screw is still not tightened. It did not self adjust after a street legal speed limit 20 mile test. Once I get the preload exactly where I want it for the street, I'll tighten it up. CRS recommends a starting point of 20mm of preload with rider weight, so the spring is pretty tight, which prevents the adjuster from spinning on its own very easily. However, I already understood that it could back off. I'm not that sharp tables, charts, and graphs wise, but the mechanical stuff I definitely have a handle on. Thanks for the heads up just the same.
The CR GS03 shocks are quality affordable shocks based on my test run. However, not for a Commando with a chain guard. I'm very happy I choose these over the more popular Maxton. I weigh about 195lbs dressed out. The P11 weighs about 350lbs, maybe less. I'm using a 110lbs progressive wound springs. That spring weight on these shocks is a good compromise for my weight. Not too soft and not too stiff. If I was going to race and knew the track was relatively smooth, I would probably use a stiffer spring.