

Should I try to do it myself?
I bought this very cool vintage sofa bed for a bargain.
However, I’m not the biggest fan of the fabric and one of the cushions feels like there is something hard inside that hurts my butt.
I never worked with upholstery, but I know my way around a sewing machine and I also used to make a lot of props for theater.
Is this something I should try to do myself or not even think about it?
EDIT: here’s a video (not mine) of how the mechanism works: https://www.instagram.com/reel/DQUP9tdDTDz/