RE: North sails mast compatibility
Note that pictures are with sail downhauled 2-3 cms beyond max spec and that's what's causing loose leech. I definitely wouldn't go sailing rigged like that, this is just to show that excessive downhaul is needed to de-rotate the batten above the boom.
With less downhaul but again to max recommended spec (474), the leech looks good and top panel looseness meets max VTS marking, but then the batten sticks in front of the mast:
needing massive outhaul to correct.
It would be most helpful If any owner of a recent camless North sail could compare where batten tip ends when downhauled and no outhaul tension?