Good find dravas. For those looking for a little cheaper out, check out the link to grainger for the ball sockets & fastenal for the threaded rods in that same thread. Looks like a cost of about $80 for the diy'er. I think this system would negate the entry/exit level, however. the addition of a short offset on the sensor arm where the ball socket mounts (effectively moving it closer to the pivot point of the sensor arm) would probably restore that & still give you the lift you wanted with some careful adjustment of the new linkage. Interesting possibilities.