Thanks for the update, Markus! However, I'm still getting the same odd mousewheel behavior as described previously. As before, I need to vigorously move the mousewheel to get any response at all from the virtual knobs on the GUI, and when I do it's a large value jump. I've tried both Cubase 10.0.15 and Ableton 10.0.5. Same behavior, so the issue is not the DAW. Please kindly look further into this.
There's also a new issue where clicking between the four synths causing about a one-second long pause, which wasn't happening before. This is mildly annoying.
Regardless, I very much respect your work, as I'm very happy indeed with the sound of these instruments.