Great job guys, by the way I suggest a little heat shrink on your terminals to keep moisture out of the crimps, I also suggest soldering the connections to the faston connectors and then heat shrink. You dont want any corrosion to develop. I am looking at this setup for my Ford F150 to try and improve mileage and increase air conditioning performance in the summer. On some other sites I am on the through the radiator mounts of fans has developed problems over time. If you are using the original shroud I would have made brackets to mount to that shroud. This would eliminate any contact through the fins. As for controllers there are many the SPAL controllers have proven to be very reliable. Another fan that is widely used on cars is the Lincoln Contental Mark VIII fan which you can get on ebay or junk yards, very high flow, very solid, probably too big for the Lexus. Great job and enjoy your fans. By the way some even put led lamps to tell you when the fan is on. The other benefit is that the lack of a fan on the waterpump increases the life span of the water pump.