Cant wait to get some MLV in the doors. I can tell that those are not treated as well as the rest of the cab.
65-70% of road noise is transfered through the doors.
In my '97 I did three 8" wide (approx.) vertical strips of the MLV on the inside of the outer sheet metal followed with a full covering. Then a layer of 3/8" (Metric? Dunno.) of the closed cell.
Those three strips because they will cancel out any panel resonances.
Once that stupidly designed inner panel was back on, I covered that too, with cut-outs for the panels bolts. (One day that panel WILL have to come off again! It's a 400, after all.) Made sure not to cover up the D/P push-pin holes.
Found out that it's not a good idea to cover those low/rear inner vents. That MLV is tenaciuosly sticky. PITA to get it off the vents.
Anyways...
I added one more layer to the inside of the plastic door panel.
Installed the D/P with all new push-pins.
All this took a while as I had to keep checking for clearance & interference.
...and then I had the other door to do.
My door pins hate me.