Hi TheZoomer,

>I sat here playing with a glass of water, and boy it sure looks like something like a light oil would work great?

Hmnnn ...... not a bad idea at all. A double ended paddle sitting on top of the oil with an axle through the middle. Coupling electronically to the axle's position relative to the glass would be simple.

Re tilt sensors (accelerometers): Problem with them is they react to acceleration in opposite phase to the tilt, thereby cancelling the signal. Just picture a small weight secured with a spring at each end. When you tilt it forward gravity pulls it forward, but the DF will also fly forward, and it's acceleration forward forces the weight backwards (cancels the original gravity pull). They're great for static tilt applications though. Better than a gyro.

Might pay to check out the acceleration effect on that glass of oil.

Cheers ADI