I did try taking some last night on my android table. But I haven't mastered that yet. Then I tried taking some on my phone, which I thought I'd mastered, but obviously haven't as they we're dark.

Anyway, today, in natural daylight, they have come out better.

Had similar, difficult to bend and then fit.
EGT sensor is IMO easier, as its a fit and forget.
Changing sparks plugs, was a hassle

You change your spark plugs!

I've been thinking about how to situate the ring, but haven't come up with a final solution yet.

However, I have had the sensor working on the bench using a little arduino sketch and an Uno. Based on boiling water and some packs of frozen veg, its reasonably accurate at room temperature. In the car may be different.

Not working on Speeduino yet though!

Arghh ..... I fried the chip!

chips should be fried?

Try oven chips next time ....."McCain, sponsors cylinder head temperature gauges"
T.

Myself, I thought it need a fried egg with it.

I've order another chip. Going with Adafruit this time, as I couldn't find a McCain's.

Adafruit, expensive but quality and will work.(if used correctly:)

Well, I'm going to get a 1/2 doz eggs anyway.

Sensor circuit is working on the bench now. I soldered the wires on this time. I think last time when using little push on leads, I put one back on the wrong pin when it jumped off.

That's on my test MCU. Time to try it on the Speeduino, but still on the bench.