Wondering if anyone installed their own Sigma Six shifter on their R. Last night when I was installing my I came upon a part which was left behind from the OEM shifter. On the front to back cable there is a white plastic disc that I couldn't pull off or push up. I left it on and installed the shifter anyway. The shifter appears to be working fine, because I was driving the car all day today without any problems. Did anyone cut the white plastic disc off?