Allocator, I've tried that, but if I filter on <300.7 for example, I still get everything that's less than 3000nm as well. If I put any zeros in front of the 300.7, then I get nothing in my aircraft list.
I reported this back during v1.4 beta testing, but I still can't get a filter on <300nm working.
The most useful filter I've found is Latitude >55, but that still gives me aircraft over Russia, Norway, etc.