I do not know this person, nor am I associated in anyway. The person is a member of ISSCA, NAISSO and all that other good stuff. It seems like a good idea and he came down on the price. I ordered one just now for the 9C1. I hadn't heard of it until recent and I'm sure some of the older heads in here have seen it before.
Link to order from for discounted price.
http://www.fuelgaugecalibrator.com/ISAACdiscount.html
Product info page
http://www.fuelgaugecalibrator.com/bbody/bbody.html