I've been thinking about adding a valet switch to the truck after the mods I want to do done (if that ever happens). But I want to take the idea one step further and use a 3 way solenoid, valve closed, no air to the AFC, position 1 open full pressure to AFC position 2 route air through flow control device of some kind (boost elbow) to give the AFC half pressure (or whatever). Full power for hotroding around town, regulated power for towing, and no power for economy. Anybody tried this? Any ideas?