I wouldnt feel comfortable charging people for it... Although it does work! It takes some fine tuning with your voltage tables to get the car to idle properly.
You also need to remember that some plenums dont have the first IAC hole blocked off meanig that if you were to take a pencil and drop it in the the hole closest to the TB the pencil will fall all the way through to the inside of the plenum. If this is the case you need to make a gasket that blocks off that hole or else the plunger in the IAC will never be able to control how much air it lets in. Most plenums this is not the case but on the POSI ported Dragon SBTB plenums this is the case. I just made a gasket that blocked the first TB port, and it works fine.