Posted for "Bryan J. Burr" <bjburr@mwheli.com>:

 I have the Grant Rapids Tech engine monitor.  It is the system that is
 provided to Chelton and is sold as a chelton unit.  I have had some
 problems.  Mostly with software upgrades.  It has been sent in twice.
 They are great people.  I saw their new EFIS at Sun N Fun a year ago.
 It looked like a great product given the price especially.  I would
 seriously consider it on my next plane.
 
 Bryan
 N132BB

"""
 Mike, or anyone with experience with Grang apids Technologies EFIS (not
 just the engine monitor)...
 any problems?
 Thanks,
 Terrence
"""