I will stand corrected, but no such thing as a EC145T2 anymore, Airbus put numerous memos out say that the BK117-D2 is the correct name, H145/T2 whatever is a marketing name as has been stated before just to confuse things.
Dont dismiss the D2 type rating if you have not used Helionix before there is a lot of differences there and slot to take in for the first time user.
Airwork 850 upgrade is a STC so type stays as a B2.
It will be a seperate rating just to know all the 117 variants soon!!!