The GM resources hex maps all seem to be the wrong scale when uploaded into Foundry. Gotta offset each one by around 50-55 horizontal and 0-1 vertical using the hex grid map (or use grid alignment tools) then switch back to the blank one when you've got your scale sorted, but some of the maps (map 5 for example) seem to have its hexes come out at slightly different sizes on the left and right of the map from each other, so its workable just a bit tedious if you like perfectly aligned grids or don't intend to use the blank versions. Hope this helps other GMs with their setup.