Had a couple of spare hours yesterday so measured, cut and cut some more to get fuse box recessed into nearside wing, was considering leaving the wing intact and mounting it upside down inside the wing yank style but thought a) it would be a pain in the a** and b) it rains in this country and a wet fuse box would not be ideal!
Doesn't look too bad and fuses are still accessible, just need to rust proof the cut edges and put some grommet strip around the hole, will eventually mount fuse box brackets on inside edge of wing to tuck it in a bit more
Next job is to sort out cabling for Battery to Boot relocation!!