Well,
I have my feet up as you know.
I have an old record cabinet which, together with my chair raises the height of my legs so they are horizontal.
On to this cabinet I have made an angled box to which I attach the pedals with 2 large strips of velcro .
In this way, the pedals have a higher angle and so are very comfy in use.
I have my computer in an old airing cupboard which is a particularly good size, if you emptied it out you could walk round in it.
The pedals are on the box pushed back to the wall and to stop my chair moving backwards when I push on the pedals, I nailed a piece of wood just inside the doors (which are open when I'm playing) and hook the front runner over it.
I just wish I had a picture to show you.