aye, thx, @PimaxQuorra ! 
something new, respectively old: mann1x wrote (for older pimax headsets with the pitool) on an app called BSManager (BaseStation Manager), which is capable of switching your basestations on depending on power state of your headset (pimax Crystal). unfortunately he stopped three years ago, but the sources are there, available and can be used for your setup, after some edits done to it
in the state it is on github it is not usable for our crystal 
it needed edits, for the services, pimax play software and the headset itself. what came out is very practical little tool, which also has an RuntimeManager included. means, you can activate an option in the tool to let it autostart with your machine and watch out for your headset being powered on. it then switches the basestations automatically on and starts pimax play, if you want to. or only the basestations; and when you switch your crystal off, it will close all the services and shut down the basestations too. it needs a bluetooth LE device, this is used for connecting to the lighthouses.
Iโve compiled a version of it for our Crystal headsets. just try it out if you want or need to, I personally find it very useful. it needs .net framework 3.1, which is included in the zip file. itโs scanned and virus free of course, available for download here:
virustotal from downloadable file:
basestation manager, original sources mann1x (thanks! :)), edited for crystal (only crystal, added to the older headsets which are already available in this software):
source, itโs explained much more detailed there of course::