I discovered a need to visually see the gears being simulated in the eCVT hybrid transmission I wrote, so I made a very basic eCVT Debug app to show them. Don't expect the gears to line up; they just rotate at the correct proportions (but scaled down).
In the latest update to my ETK800 and Citybus Hybrid mods, I changed how debug information is presented. Seeing the inner-workings of the hybrid system no longer requires unpacking/changing the mod, as the debug information is exposed to a new UI app in this mod called "Hybrid Debug". A large number of internal values will be shown in a table when this app is added.