I have a 09 550 that had awful clutch engagement. I recently put the silver EPI spring in, which made a huge difference in engagement, but now it shifts kinda hard. It "jumps" a little when you shift. So im thinking if I could get my idle down to where the newer ones are it should help with the shifting. Mine idles at 1670 – 1700. I see the new ones idle at 1475 or so. Could a dealer lower my idle?? Thanks..