VSKYLABS CTLS pilots! The VSKYLABS Flight Design CTLS Project was just updated!
Current version is now v1.15. It is a minor update - a Slip Indicator was added. The Slip Indicator is not existing in the whole-glass cockpit panels of the real CTLS, as it is having a synthetic display embedded in the glass cockpit elements.
The VSL CTLS is equipped with an improved-classic cockpit panel which has optional glass cockpit element however it was not indicating side-slip...
With this update, a physical slip indicator was installed into the cockpit, to allow side-slip indication for both the classic and the *improved* cockpit configurations.
The update was injected via the STMA autoupdater. Simply load the aircraft, let it update, and reload it so it would have effect, and you're done!