Here is an article on hacking a cheap inclinometer for use as a throw meter or incidence meter. A new 3D printed enclosure/clamp would be nice.
http://www.mfhb.org.nz/joomla/index....cles&Itemid=98
My hanger 9 unit is still good. It has the same accuracy as the inclinometer used in the article.
My ideal unit would be an Arduino with tilt sensor and bluetooth transmitter to an app on my phone or tablet.