Cheers for the comments guys.
@J0hnny I'm not much DIYer either and this was the first project I made out of wood. I would really encourage you do it. Well worth it.
@Ihatederekreed actually I wanted to make it even wider as more comfy for me, but angle could be adjusted. Indeed you can just glue the rubber or wood as I did.
The only thing I would add is some kind of locking mechanism, so I could fold it and put to the hand luggage without worrying about damaging the knobs. Any idea welcome. I've seen metal cases that did that. They weren't cheap tho. Cost for this one is probably less then £5