Hi everyone! I've just discovered this very interesting forum... 
I have to say that every Epsilon owner has to deal with magnificent but different beast.
I personally own a 210 f3 which is quite old and, in my experience, very different from the smaller brothers in terms of mechanics... Every diameter up to 200 seems to be different from the other for collimation, adjustments and so on... My experience with the 210 doesn't allow me to help others with the 180 i.e. respect to collimation procedura, the scopes are simply too different. 
Enyone out there with a 210 or bigger One?
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