I do have two layers and it's worked great.
As far as the brake upgrade, My 2006 had the original Brakeman upgrade offered by Sportsmobile. If your Van doesnt have these, I'm not sure the following explanation will help you:
This year I had the calipers pulled (as recommended every 3-4yrs) and sent back to Brakeman to rebuild. The shop that has been performing most of my work discovered the Brakeman rotors used were actually undersized (the brake pads hung over the edge of the rotors and were not fully utilized). Shop upgraded to a larger Wilwood rotor (14.25x1.25,) which works so much better! I also had them do the Hydroboost conversion.
Couple Pictures in my album detailing the parts
https://www.sportsmobileforum.com/fo...cture42628.jpg
Brake pedal now feels like I'm driving a luxury car, and the stopping power is just as surprising. Together, they represent the Best investment I've made on my Van to date!
Couple links concerning the brakes which you may be recalling:
https://www.sportsmobileforum.com/fo...des-25757.html
https://www.sportsmobileforum.com/fo...akes-4060.html
And I also posted it on the "what did you do to your Sportsmobile today?" thread
https://www.sportsmobileforum.com/fo...tml#post271216
Post #2968