F70 were used (operated) before by OS in their markings, then as Tyrolean, then as Austrian Arrows, then as Austrian operated by Tyrolean, then as (current version) Austrian. Now they do not get the latest rebranding (lightblue belly colour disappears, wording "myAustrian", engines in white-red of latest painted A320 and all Embraer of OS) as they will be phased out soon. A bit complicated. ))
F100 previously operated at US regional airlines.
Waiting for your work in progress report! :-)