Firstly that the buttons in AH conform to the Windows standard, so when you click on a button then mouse off it and then release, the button does not activate.
Secondly, can we please have some proper training aircraft? E.G. dual-seat Spitfire, and, for the bombers, have a LH seat and a RH seat available (with the RH seat overriding the LH one in the TA).
