On a recommendation by "BasementDwellingGeek" at cpapTalk.com I got a new toy... an accelerometer. It is Model X16-1C made by Gulf Coast Data Concepts in Waveland, Mississippi. Here's the web page to the device:
Gulf Coast X16-1C Accelerometer
It cost me $89, plus shipping. Is it worth it? For me, clearly yes!
Why an accelerometer? Well, it clearly tells me my sleeping position.
In the coming days I'll write up what it looks like, what I got with my order, how I set things up to use it, the data it generates and what it is telling me.