Santa brought me the Ron Francis XP-777

I used the hinge that they sell now to mount it under the dash under the glove box. Once mounted it tucks up and out of the way. The best piece of advice I can give is run every thing to where it needs to go but don't cut or terminate anything until it's all in place. If you need to tape notes to things so you remember, do so. You will probably reroute a few things before you are done and this way makes sure you don't come up short on wire anywhere.