I love maple fretboards, more than half of my builds I've used maple. I have noticed some pieces will swell a bit with humid climates/big swings in temperature. Best solution I've got is to fret about a third of the board and then re-cut the remaining slots because they start to close up. I used to go from the 24th to the 1st, but now I intentionally skip to every third slot. Then I will try to push just the corner of a fret in the slot to measure how tight it is. Seems to be a good measure if I need to re-cut any slots.