Just got my selectable Sprint Booster today - thanks, Karl, for the great service. Can't wait for tomorrow so I can put it in!

EDIT: Had to wait until Sunday to put it in - took all of 10 minutes and 5 of that was waiting to disconnect the TPS per the instructions. The difference is incredible almost no lag when stepping on the pedal - it almost feels like there is a throttle cable now. It is now much easier to match revs while shifting. Definately a MUST HAVE!