Well, when I say 300rpm, I don't know for sure. I'll know for sure when I fit the accelerometer. To fit said accelerometer, I will use a modified version of a J2O bottle lid.
http://i1280.photobucket.com/albums/...ps754eb0e9.jpg
http://i1280.photobucket.com/albums/...psfafc2b64.jpg
I'll cut some foam to fit the inside of the lid, then put the accelerometer in with the wires all soldered, and zip-tie it all down.
http://i1280.photobucket.com/albums/...psfc59ba88.jpg
http://i1280.photobucket.com/albums/...ps28631296.jpg