This is a kit I put together from various sources.  There's plenty of info out there on the benefits of a Lift Reserve Indicator but many of the kits available go for $300+.  This works strictly on air pressure, no power required.  All that is needed to install this is to provide pitot tubing from your panel, where the gauge mounts, to the LRI Pitot mounted under your wing.  I provide the Template for the gauge, the Pitot and the Gauge.  The Pitot is marked for where the High and Low pressure tubes attach.  Kind of a no brainer installation.  However here is a good installation and calibration method on this website:http://fly.hiwaay.net/~sbuc/journal/liftreserve.htm

My price to you is $100 plus $15 shipping to the lower 48 in a medium flat rate box.

My email is: donmorrisey at gmail dot com

Text is: 617-eight two eight- 5550