Just purchased a clean 07 is350 and absolutely love the car. However there's one thing I'm really bummed out about and it's the garbage paddle shifters that don't actually shift gears. What all would I have to do to make the paddle shifters in the is350 work like normal paddle shifters? (Full control over upshifting and downshifting). I know it can't be easy or cheap considering I can't find anything online about people doing it, but it's got to be possible somehow right?