Would it be possible to get a warning when you fly at the wrong FL according the SemiCircular Rule?
Also a notification of the several transition altitudes by country would be welcome during the flightplanning.

Also could we consider adding this as a recommendation in the planning phase too?  i.e. I put a route in from Goodwood to Rochester and the default height is adjusted to reflect the correct altitude for the rule?  I'm a low level flyer (don't get as high as FL) but I seem to remember my CFI recommending to follow the Semi-circular rule at whatever height....