Dremel that for sure man. Is the monitor mounted permanently already? You might have an easier time just marking where to cut, then taking the monitor off and cutting it outside of the cab. Just a note of advice, make sure you wear some good goggles and you have plenty of cut-off wheels for the dremel. The stupid things break often, and they fly all over the place. I got one right next to me eye once, maybe a half an inch the other way and I'd only have 1 left :/. If you can't take the monitor out, just be careful that you don't go too deep into the MDF, but I think you should be A OK cutting through that stuff. Keep us posted!