Materials were pretty basic:

MDF - However I would suggest a harder nicer wood now that I am done. Some of the stuff I need cuased splits in teh MDF and I had to rework ... which sucks.

Black textured paint matched my car perfectly. You are going to have to try different things for differnt cars.

Bondo Fiberglass car filler.

1 wood dowl. Drill a hole through the top of the piece into the swivel piece from both ends (dont go into your wires!) and shove it in. I used some small nails at an angle to keep them where I put them but if you drill the hole the right size you shouldnt have to. I was worried they would work themselves out over time and taking my dash out is a pain in the butt.

Using the router to cut was the hardest part. It takes a lot of planning and making quick fixtures so you get straight lines. Well worth it though. Routers are just plain fun. Everyone should have one and a small set of bits (EXPENSIVE!)

Really thats it. I'm not going to go through how to hook up a amp and sub. There are thousands of sites to look that up on.

I was happy to see that the N810 but out enough juice on teh headphone jack that I didnt need any sort of Line driver. Again I am not an audiophile so I am not using high end speakers (using stock) and I'm not trying to have people in china hear my music either.