Sorry for the misunderstanding. I'm not asking, it's a tip. The small water level / bubble level gives a little help for installation and alignment if the D3 run-up time takes a long time.
I tested my new D3 carefully at home. Now the test on the plane is still pending. I would like to mention two things: I really like the Mini-EFIS. Secondly, with a simple paper sun shield and automatic brightness adjustment, additional energy can be saved while being very readable. The D3 case...