I am considering a slingshot misfit 132 x 40 for powered up boosting sessions. I mostly ride a directional unless the wind is at the top end of the kite I am using so i am not really worried about the low end.

I would really just like to be able to hold down a lot of power, Is 132 too small for my weight of 100kg or should it be about right for a lot of power.

I currently have a naish motion 142 which I feel is a bit big for what i am trying to do.

Much too small. Go for the misfit 136, it's what I went down to after a misfit 142. Great boards and a world different in each size.

l weigh 110kg and use a 134 x 42 Shinn Monk. I also demoed the 132 Monk was told to get the 134 big mistake the 132 was perfect. l have a Slingshot misfit 135 gathering dust the Monk is far better no spray in your face holds a much better edge.

I don't think the size of the board will be much of an issue if your using it for big wind, with enough wind you can kite using a mcdonalds tray. Only issue is if you are tall you prob won't get your stance wide enough. Always try before you buy if possible.