I'm doing an ABZ - FRA - SIN quite soon on a Sunday evening, single ticket with a 65 minute transfer. Sitting near the front on the first sector so should be quickly off. As this is purely transit and not going into Schengen guessing there'll be a gate security check is all?
Yes, just security - and maybe not even that, depending on the arrival and departure gates. You should be OK provided the first flight arrives on schedule. But even a 15-minute delay will make things quite sporting, the more so if you park at a remote stand (in which case sitting near the front won't help). I guess it depends how important it is that you (and your checked baggage, if any) make that flight to SIN. How long until the next one?