Hi carbon gurus !

I just landed myself a sweet lightwind board I intend to use for foiling.
It's an AHD formula carbon construction. Not so uggly , but way too long to fit in my Hyundai H1.

I tried it yesterday, love it ! So now considering shortening it to fit the car + make it more jibe friendly (a much better foiler than me tried it and told me so )
It's already been fixed once underneath and covered with a large monopad (great for foiling)

Could do with a good 20 cm off. here are the pics.

How would you do it ? (please don't go too technical in terms or I'll have to use google translate )
I'm keen to have go, no vacuum pump or other magic tools at home !
BTW I paid 50$ for it


Cheers
sean