I entered it a few years ago - great fun and highly recommended! My only advice is: don't use those silly navigation thingys you are supposed to pin to the map as they are top-boll*cks! My co-pilot / navigator inadvertently pinned it to the WRONG VOR (!) and it was only later that we realised our error (of course we failed the navex!) - but it dawned on me that there is not the equivalent of identing the VOR with morse to stop you making such a gross error! OK, I admit it was a stupid mistake...!
Still a great a event, and I hope to do it again... using more "normal" navigation methods.
But I agree with what is said above - at headline level at least it is a great joke to think that a gaggle of TopNav competitors got lost and busted the zone!!!
Andy
