A observation on this topic. When TruTrak could not deliver the 2 1/4" unit I had ordered I opted for the much more expensive Mid-Continent. Not what I had planned and a whole lot more money but I needed something reliable while awaiting the Chelton Pinpoint GADAHRS. The AI was a little unstable and we thought that it had not been set for the 8 degree panel so we sent it back on a rush basis.
A few days later Mid-Continent called and left a message saying they had replaced a bearing and asked for return shipping directions saying it would go out the following day. Then they called back and left a message saying that it would go out that same day. They then called back a third time and Mark picked up as the woman at Mid-Cont who did not realize the phone was off the hook said to someone else in their office "I can't get anyone there - let's ship it overnight express".
Seems that Mid-Continent not only makes a quality product and stands behind their warranty, but they default to getting product to the customer ASAP. Very impressive!
Robert M. Simon
ES-P N301ES