I've seen poles used in cheap foamies - what happens at the end of the board where even a very low rocker would obstruct a straight pole? The rocker means that the end ~>15% of each end of the board is not covered by the stringer.
Do those sections have a more conventional stringer in them at the ends?
Thinking out of the box, perhaps some of the pole could be left coming out of the board with the advantage of more pole in contact with the skin of the board.
I couldn't find anything about this in the archives.