I would love to have a NC mill... one day I will! Until then, I will let the pro's burn the chips.
You can chose to keep the water to air HX and really not a bad idea for a street car. It will need to be plumbed in series with the chiller. The air to water HX will need to be bypassed while the chiller is operating though. The air to water will actually add heat back into the chilled water. This can easily be done with a with some simple off the shelf parts (A ~$14 74809 vacuum actuated bypass valve and a vacuum solenoid). I plan on providing these components as this matures but my main focus now is to get the basic kits operational and on some cars. I am not a fan of the vacuum bypass valve and plan to develop a simple 12v valve.
I do have a running list of those who have shown interest. Once I have kits in boxes ready to ship, I will go down that list and offer it to those first. I have not asked for deposits are taken payments ahead of time. I am fully funding the start of this and have put a lot of thought, work, and testing to make this to highest performing kit on the market.
I do believe 3 of the first 5 on my list are maggie cars.