I purchased the Digicool AK-900 digital refrigeration system analyser on Saturday through truetechtools.com.
Price was $299, included the digicool refrigerant manifold. (has 90degree turn valves instead of multiturn valves.)
They shipped it UPS ground for free.
Received it today (Thursday). Will check it out and give a review in the next few weeks.
The wiring insulation on the temperature probes is pretty thick and color coded.
I'm assuming blue is for low side and red is for high side.
Look forward to mastering the use of this tool.