LinuxCNC-RIO - RealtimeIO for LinuxCNC based on FPGA (ICE40 / ECP5)

Hi,
Thank you so much for the quick fix on the touchy prefix and for explaining the call_list mechanism! That makes managing external custom files much cleaner. Also, the virtual signals logic feature looks very neat and powerful—I'll definitely look into the demo.
Regarding signal assignment in Rio Flow: while having auto-detection via POSTGUI_COMPONENTS works great for standard prefixes, would it be possible to add an explicit target selector in the UI (for example, a dropdown or toggle in the HAL-Signals section to choose whether a connection belongs to Main/PreGUI or PostGUI)?
Having this option directly in the GUI would give maximum flexibility:

• It prevents having to hardcode every possible GUI/component prefix inside POSTGUI_COMPONENTS.
• It handles custom user interfaces, custom PyVCP/GladeVCP panels, or non-standard naming schemes seamlessly.
• It allows users to decide explicitly where each net lives directly from the Rio Flow design environment.

Thanks again for the great support and active development!