I am happy to present two latest devices I’ve designed recently, the USB collective base you’ve asked for and the Bell407 collective head!
The new base has a redesigned enclosure with better-looking rounded lines, a flat back for more mounting options (the standard Gunde mount is now a separate part, you can change it to whatever you like), and the Pro Micro-based master controller in it.
Two versions are available: the one with the top slot for extensions and the more compact one. You can use whatever rear lid you like with either of them (USB or I2C version).
It has two mode switches: the one that’s been there earlier – for buttons (and now – hat switches as well!), the other – for throttle axes. The single lever can now drive twin-engine helicopters, just flip the switch up or down to choose the throttle axis you need. When you change the current axis, you have to turn your physical throttle to match your current axis value, after that, the throttle axis value will “stick” to your physical lever position.
The Bell407 style collective switch panel is the scale one, modeled after the head found in Bell 407GXP (it has more buttons than any other version). I tried to combine a cool look with functionality – it has both scale features (3-way switches with middle buttons), and mode switch support for all of its momentary buttons. There’s also a new hat switch, which you will likely find to be better than the KY-023 one, again, with added mode switch support.