Thanks for the heads-up directing me to the DME functionality of the RNAV, indeed this would make it a good reason to keep it in IRL. Meanwhile I found that it's pretty useful for reporting points in combination with the KLN90, which does not have them. SO right now, only a more modern transponder would be cool, something simple, but not yet simulated maybe.. TQ TTX2, or a Trig TT31, or [insert whatever option here].