I have a Mavic Pro which I want to take with me on a trip to Europe, not to fly but so I can reclaim the Australian GST.   The countries I will be visiting include Eastonia Poland and Russia.  I see Russia requires Drones to be registered and marked, but not sure when.  Will I have any problem if Customs in any of these countries see it at point of entry?   Also Finland Denmark and UK.  Don't expect a problem in any of these last counties.     I definitely will not fly it, except maybe in UK.  

Definitely no problems in EU countries to bring the drones. For flying permits, see individual country laws. Anyone can give a short answer for Russia?