I've built quite a few control panels (over 10 different designs, for 6 different sims) This one actually has the fewest buttons (that I am putting on it), but should have the most versatility because of the "interchangeability" it'll have. Thanks to the MFD's and G13. After doing the math, this will have a total of approximately 225 buttons/switches. I'm really striving to not have to make another version of this ... but I'm sure that, in time, I will. haha.