Great write up. A few quick questions though, since I am a beginner (already made an unfortunate mistake of buying a Dynamat trunk kit).
1. When you speak of adding foam above the layers on the outer door, do you mean just behind the speaker, or the entire door?
2. Could you describe the door speaker baffles a little better?
3. How do you seal off the access holes with tin/aluminum (glue, weld, rivetm, etc)?