I’m designing a button box for the huey imo anything you do in flight must be either configured to the hotas. Or a button box at this time. What I did was list everything in a spreadsheet list what type of control a toggle, push button or rotary and the number of contacts need one for push button, two for rotary and. 2-3 for toggle( because even a single throw toggle needs off and on). Then group by. Flight , comm, or weapons device the select which ones I use the most count contact and adjust from there. I’m building my own and have two boards to go with that dictate number of contacts and switch type ie if I can have an hat or not plus number of axis available which in my first box isn’t being used. But I’m either buying a huey style collective and or adapting mt puma collective by retiring it using a bodnar board since the notice board doesn’t have the ability for the controls needed. In the mean time I’m using my cougar mcfds switches in a test since the huey doesn’t have ant mcfds. So do your research and consider building your own using a bodnar board or andrino board then it’s just running the wires and plug and play except for you may have to flash the board depending on the bard and controls used. Look in to it I can provide sources for parts. Is just laying up the controls and drilling the holes installing the control then running the wire to the board no soldering usually.then plug and play