I'm in the process of redesigning my rig with new hardware and currently researching parts to build a custom handbrake but since i need to buy a controller board to map the axis i got to thinking it would be a waste to only use 1 input. I havent decided on which board im going to use (dsd, bodnar, arduino, etc) but any board i buy will have multiple button/axis inputs i dont want to waste. I'm thinking of making a button box (not sure exactly where i'll mount it just yet) but from doing research on pre-fabricated units and community diy models i got to thinking what exactly would i use it for? What are some common functions across multiple games that you or people you know have mapped to button boxes? Aside from engine start, up/down/left/right inputs, enter, pause, escape, what functions do you find you use on a regular basis while driving? The sims i play are the codemaster F1 series, rfactor 2, iracing, and soon looking into asseto corsa. My new rig will have VR incorporated so i'd like to map it out in a way that i can navigate menu's with just buttons so i don't have to look for my mouse/keyboard blind but aside from the control functions i talked about above i'm not sure what car functions are worth putting on it.