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Hi Keith,
I had an original EFIS Lite that was upgraded with a remote screen.   The 
Horizon continually toppled and BMA replaced the unit with the latest G4  Sport.
 BMA are good to deal with and you need to speak to Larry  Romig about any 
queries you may have.  Map is very good and everything  works as on the Tin but
earthing is a problem as the unit generates quite a lot  of "noise".  I have 
put ferrites on all of the cables coming out of the  plugs on the EFIS and this
has certainly helped along with a separate earth  strap to the case of the 
unit to the Earth Bus.
Trev
G-LINN
   
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