I just ordered one of these http://www.hallmanboostcontroller.com/

I.have the Dawes on my car right now http://www.dawesdevices.com/boost.html it works ok but the adjustability is limited

the problem with the home depot set-up is that is does not incorporate a spring loaded pressure relief valve, so it's hard to dial out boost spike

 

I feel like king now that I finally figured out how to work my home depot valves...I have both the turbo and prespool...I was getting 12 - Spike to 14 - 11....I opened up the turbo control to settle the primary at 10 and then slowly opened the prespool ...now getting 10 - 8 ) - 10 with a small spike to 11. Team home depot rocks!