Thank you for sharing this terrific concept of converting mono signals into stereo! Here is your patch after updating the Interstage with the version by Airwindows, as suggested by @PaulPiko (Thanks!).
mono-to-stereo_reverb_with_mid-side_Airwindows version_20240731.vcvs (10.4 KB)
I then created a use case with a serene string-like sound and key controls being managed via PatchMaster. Import this .vcvs via stoermelder’s STRIP++ as described elsewhere.
Mono signal to stereo reverb_Use case_20240731.vcvs (26.0 KB)