I'm still on Christmas holidays, and i finally got around to doing something I've been meaning to do for ages. I took the official maps and added an extra row top, bottom, left and right.
The only change to the maps I made was to complete the islands on the #2 ORB map. as they were off the map edge previously.
There's a two of instances were objectives are on islands. I left those as is, but i suspect the best fix is to move the top and bottom objectives towards the edge of the map by one.