I looked at a plane where the owner replaced most of the steam gauges with an Integra 6624 and Avmap GPS. If those are lost due to a power loss or lightning strike, the only flight instrument is a compass. No air speed, altimeter, VSI, turn and bank, or gyro's - just compass. So what do you think?

I have always liked having some redundant instruments, and while this is a VFR aircraft if you happen to get into IMC with just a compass it seems like survival gets pretty unlikely. In IFR aircraft you usually have electric, air pressure, and vac powered instruments so no single failure will leave you flying blind.

With the current state of aviation electronics, that have both panel power and an internal battery, would you fly a VFR aircraft with a glass panel that is not just primary, but is the only source of flight information other than mag heading? The Integra and Avmap provide a nice display of more than enough flight information, as long as they keep working.