Of course I love RUMlogNG and have always appreciated the additional capabilities that have been added through the many years.
I came across something as I was looking at the web page for a logging program a friend uses. (He's a Windows guy, and the software he uses is for Windows only.) It integrates with VOACAP (the propagation tool) and shows which bands a particular callsign would be optimal for contact at any given time. It then goes a step farther and "qualifies" (green, yellow, red) the entries in the DX Cluster part of the program.
Here's a link to a page that describes and visually shows what this VOACAP integration looks like:
https://www.log4om.com/voacap-integration/
Incidentally, the VOACAP propagation is very cool as a standalone website in case someone here hasn't seen it:
https://www.voacap.com/hf/
I'm a RUMlogNG fan and a VOACAP fan and would love to see them play together.