Flex Fuel questions

[asshanson]

I know there was a group buy awhile back on those ethanol content LCDs but they seemed pretty expensive so I decided to wait. Does anyone know who organized that, or how they came up with the specs to send to the manufacturer? I know some of the sensors have three wires: power, ground, and signal, so all you need is a lookup table or formula to map voltage or hz to ethanol percentage.

Are the ford and GM sensors different? Were the LCDs made to work with a certain brand or part number, who actually makes the sensors? Also, where did people find the sensors, in a junk yard? Online they seem to sell for $600+ new which is ridiculous.

I know I could look up some of the information myself, but if someone else has already done the research I figured it would be worth sharing with the group.

Thanks,
Andrew