Sabre overlay check means checking the overglove conductivity -- same as what our armourers check.
I have been going to these tournaments for years, and they are very good, very well run and much fun! Plus, it's a good excuse to visit Europe (if you haven't been there, I would highly recommend visits to Holland, Denmark, Iceland, Germany and Sweden -- and of course, the rest -- I just haven't gotten there yet, so I can't recommend them

) Plus, the most interesting think I can say is that Copenhagen is like a European version of Greenwich Village, which while giving it a European flair, also gives you the feeling of home (of course, only if you have spent much time and/or lived in the Village and consider it home

.
As to airline bargains: Scandinavian Airlines usually has a winter weekend getaway special, which for about $300 gives you airfare and hotel for the weekend -- it makes the Copenhagen competition extremely cost effective! Plus, the bonus is that the hotel is located so close to the venue -- you can take a cheap cab ride or a long walk to get there! The other Airline bargain is with Iceland air. When you fly Iceland air to any destination to Europe, they give you the option to stay over in Iceland for up to 3 days, with a hotel fee of about $40, so you can arrange your travel to do the competition and then continue on to Europe for a vacation.
Also, just to mention, the Coupe du Nord circuit is for sabre; however, Normann has been instrumental in helping the epeeists to also get satellite events on the FIE calendar. Any epeeists interested in competing in Europe in a high level competition, but yet, not as intimidating as a World Cup, should try these. For this year, they have 2 in Denmark, 1 in Norway and 1 in Finland. You can find the dates on the USFA page for World Cup competitions, and you can find the invitations for the competitions on the FIE website.