Yeah super good question as I use multiple brand foils , my previous 8-0 Harpoon the rear of the 16 inch box was 600mm from the tail on my new 7-10 it's 525mm from the tail and the Axis 1300 is one inch from the back of the box , so that's spot on for the Axis 1300 and if I use the ART's it will creep forward. I'm definitely going further forward with my Cabrinha rigs and when the new 1300 comes out it will be way forward of the Axis 1300 on the Harpoon but well within the 16" box range it will also suit Uni no worries. So I reckon I'm on the money at the 525. If you go longer in board length bump the boxes forward , shorter do the reverse. I was in SurfFx to and checked out the brand new Armstrong 7-2 & 7-7 DW models... mate these boxes were super forward around the 725mm mark

so NO to Axis , Go Foil & probably Uni on these boards but sick looking boards though.
Alot of the box placement comes down to board design as well , if you have a long and skinny like the Harpoon or Barracuda the board will start to plane without foiling so your foot placement won't shift. If you have a Sunova Elite , Amos , Armstrong ect or similar with a fuller nose you will need to stand further forward to drop down the bump or thump it up , problem there is once it tries to foil or you miss the bump you are too far forward broaching the nose and you can drop over the front . Once you get it together on these fatter type nose boards they do push up well but a miss will put you in the drink . It's a more advanced skill set. So getting back to your question on these boards because you end further forward paddling in so should you boxes. IMHO