Unless you install an approved electric needleball your stuck with the venturil. A needle ball is a required VFR flight instrument. I have kicked around putting a electronic horizon (trutrak not sure there still in business) in my bird but as of now they are not TSO and can legally only be used in experimental aircraft in the states. I talked to my aviaioncs guy and possibly could install as supplimentary equiptment but would require a FAA field approval. The topic came up about coupes being certified prior to TSO regulations The radio shop still reads the rules as coupes are certified aircraft and new equiptment must be TSO unless a supplimentary equiptment field approval is granted. Probably not much of an issue for the feds but is it worth it to go electronc to the tune of $2000 plus to pick up a mile or two at best. My issue is more to having a horizon if I blunder into a milk bottle of course there is always needleball airspeed
