Some where to rest your arm and place your food.

One thing I have learned, I an no carpenter.

40mm rebate to fit under window frame

Biscuit joint to hold shelf  top down with out screws

Biscuit joint to match shelf  top with a bit of measure 3 times and fingers crossed.

dry fit to check all is good

I had to cut a slot for the seat belt to run smoother

Looking good the Blinds cassette will cover the wood. Now for some tableage.

First pattern 400 wide and too long

450 wide and 600 long

now I only need to find a nice lightweight board