@Garmin: Stableford is still not working - regardless whether I use my official handicap or local handicap or whatever. Still nonsense.
Again: There are free iPhone apps where you could just enter your official HCP and the program would 1) calculate your local handicap based on slope and CR value which the app downloads from a database and 2) distribute additional strokes based on the handicap values of the individual holes - which it also downloads from a database. I still cannot understand why Garmin is not able to fix this issue. Stableford is KEY for the European market - and it should work on the basis "Type in the official HCP value and the watch will do the rest for you".