I've just ordered/reserved a 4kwh kit which I'll be installing myself. I will update this thread with info about the whole process (from ordering through to results with each tank) and will of course take many pics and probably video during the install. As "gas" is so expensive here ($7 a gallon right now), and with the sale price, my payback on a system working as I anticipate is 24 months. As the kit is guaranteed for this length of time i pretty much see this as a "I can't lose!" situation. At the end of 2012, dependant on how this PHEV experiment has gone, I will either keep the vehicle a little longer (and replace the batteries if required) or trade up to an OEM PHEV of some description (Ampera/Prius/???). I'm very keen to push electrification as much as possible, so if anyone in the UK would like to see it once it's in, or ends up needing assistance with their own conversions, i'll do what I can to help.