I know there's at least 3 other 164Qs running around Brisbane - a white one and two red ones - anyone on here? anyone want to lend me an AFM for 5 minutes?
All sorted - took a punt and went richer than i'd ever tried - turns out the muppet PO went almost a 1/4 turn leaner on the AFM spring - the markings that had been scribed in the plastic now make sense, and with the bypass screw in the middle of it's adjustment it's almost spot on. Huzzah!