Well the idea is to attend a show or three over here called "compression tuning", (nothing much to do with "tuning" in the real sense, mostly bolt on and paint mods). big difference is upon paying a fee (about 20€) you can win some decent money in each class so I guess the answer is, a lot of people.
Managed to get the screen in with just the AV socket remounted 90 degrees so it sticks out the back now, just need to make a stay across the inside to hold it all in place and a thin trim to clean up the opening.