Anyone put the new 2018 roller primary clutch on their 2017 or older proclimb sleds? Was wondering if the swap is straight forward...just change over the existing spring and weights to new blank clutch or is there more to it? Is this part number CLUTCH, DRIVE - UNCALIBRATED 0746-885 the one with the roller center on the primary clutch so you can run with a tighter deflection?