You can trim down the deck a bit and voila.
There is no CF involved and best method is a jigsaw with triangular teethed blade. Run at slow speeds.
Use masking tape from bottom side, so that you can draw a line on the tape. The cut from lower side.
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I sanded the deck,. Not the wings
That is just to far over the line of manual work i’m willing to do. I dont even own tools to sand or grind. I’m sure it’s easy for most people in here. I just dont want to deal with it.
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A little late to the party here 
What hardness of tpu did you use, I only got one that is pretty soft, and it does not feel very stable after printing…
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Ours is a combination of materials. One part PETG which is hard and transfers the force to the deck and one part TPU which accomodates for flexing of the deck during use.
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Created my own wings, they are hugging an old Trampa Carve deck (around 7 years old or something), looks similar to this one:
I didn’t want to just install extensions on both sides since I had no solution of how to take the current grip off, so I made a whole “block” on top instead, printed in PETG-CF, quite happy with the results.
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