davidjohnson6 - I used Wikipedia to look up the number of seats on a F70, not sure what KLM's actual configuration is but it will be around that mark. The F100s have gone already, replaced by the existing E190s, seems KLM Cityhopper are looking to go to a single aircraft type. I did think they might have bought E170s.
Not sure who's behind the Eastern Hamburg charters, but I've heard (and I think it's been mentioned on here previously) that they're not really of much benefit as the passengers on the flights would otherwise have been on the ABZ and/or AMS, so it's just an extra landing fee.