Oh dear, AFAIK LVL D is what the GNS430/B757/B777 databases are based on, and thus also what my tool attempts to use, so now I'm triply curious, you wouldn't have an example of the issue I could look at please?
Yes but I do want to think about it, hence the "out of curiosity". But I guess my real question is, which of Navigraph's packages started to have weird mid-file syntax changes not too long ago? Don't really care about the other, presumably trouble-free format
Out of curiosity, which navdata format will your plane be using? IIRC someone mentioned it's a mix of two existing formats, but which ones would that be?