Felt, that's a good idea to mention! Actually, I'd use furniture felt pads.
That's exactly what I used,I bought one of the assorted packs and it came with 4 large square pads so I applied them to the corners and put a few of the round ones near the center and the wood never scratched the floor!
I actually cut 3 holes in mine and put 3 of the 5 wheels in the holes,this stopped the chair from moving away from the pedals.I had tried bungie cords but found if I had to get up from my chair it was such a hassel that I found away to mount my controls to the arms of my computer chair. When I removed the arm pads I found they had convieniently put holes in the arms I could use to attach mounts to the chair.
Mntman actually made something similar but his doesnt require the armpads to be removed,IIRC there are pictures of Mntmans mount in the help and training forum. Try searching Mntman and x52
