Hey, I am (very) tentatively considering building some of my own output panels for flight data (in my yet-to-be-started homebuilt plane.) As a professional programmer (working on mapping software no less) with some EE friends I believe it would be easy for me to rig up a touchscreen monitor to display gps/map data and other assorted sensor outputs far below the cost of a lot of similar systems I see around. The trick is I am entirely new to the field of aviation and unsure what regulations govern the cockpit instrumentation. I would of course plan to have some standard guages for the basics in addition to my custom monitor, but what exactly comprises the basics? What are required by law? What could I redirect to my custom output (from a legal perspective)? I am also interested in IFR requirements... I know nothing about them (I know next to nothing about flying in general yet to be honest.) In general what additional gauges are required to get a plane cleared for IFR flying? And, of course, would there be any problem with making my own display for some of them? Thanks in advance for any help you can give.