Then here's how you can repay me :-)  When you hook this up, you could do me a huge favor, and test something for me.  I only have one of the 3 wire temp sensors, which is the OAT, so I used that 5V wire for both aux liquid temps as well.  Now that I find my OAT being a bit off, I wondered if I was causing an error by tying into the 5V line for two other sensors.  If you get to the point of hooking this up to one of your existing air temp 5V sources, it would be real interesting to know if your temp reading changes when you connect the liquid sensor circuit.  I really doubt this is the problem, but had already made a mental note to check it if I didn't come up with some other calibration solution eventually.

I've found my OAT to be a few degrees high as well, but I'd attributed it my OAT location. Since I have all of my sensor connections at a terminal block on the engine mount, I wanted to avoid running the OAT wires back through the FW and out into the wings. So I got the bright idea that the nose wheel was a great place. So I ran the wires down to the bottom of the fairing and inserted the sensor into a probe tip that is mounted in the fairing just above the gear pant swivel. I thought it was pretty ingenious, but now I'm thinking that hot cowl air is being drawn down this fairing since I have sealed the intersection well, and heating the back side of the temp probe. I find the temp to be close to what my Dynon reads (after conversion from Celsius to that old fangled Fahrenheit), while on the ground, but up to 10 degrees high while in flight.

        When I get back from school, I'll look into moving this and checking the calibration.
S. Todd Bartrim
Turbo 13B
RX-9endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

        "Imagination is more important than knowledge"
                                        -Albert Einstein