Both Randy Snarr and I have full-up Dynon installations in LNC2 models.

Don't know much about the cockpit of an ES, but Dynon wants you to avoid all ferrous metal that moves,  motors, fluctuating high current etc.  The compass calibration can deal with some stationary ferrous metal.

In my case, I put the ADAHRS aft of the baggage closeout (just into the tail cone) on a fabricated composite shelf bonded to the side of the A/C.  It is fastened down with brass hardware.  BTW, if you use their heated pitot (with or without AOA) and with all aluminum lines to the ADAHRS, be aware that the aluminum lines WILL be the return path for the pitot heater current on a non-conductive airframe.  I found this out the hard way on mine.  Until I isolated it, the Dynon compass would swing 25 degrees every time the heater cycled on or off.  The fix was just to insert a one inch section of non-metallic line in each of the three inputs to the ADAHRS.  That made the compass correct all the time.

Since Dynon installs are much more common in Van's A/C, the tech support folks were not aware of the issue on composite A/C.

Tom Thibault
LNC2