Well I had a problem with the shift knob on my 6 conversion car. Originally it was a 75 2.0 four. Here is a picture of the shifter and Porsche crest knob. The knob is worn and cracked inside and will not stay in place. So, I ordered a OEM type Dansk early knob from Pelican last week (what a deal - only $25). I had to get the crush sleeve from AA as they were the only supplier who had them in stock. When I got the knob and tried to install it I found that it wouldn't fit...too small. So, my search for another crest knob was on... I found one but wanted to make sure it would fit on my shifter. I took a picture of the shifter and downloaded it onto my computer so I could send it to the seller. I zoomed in and found that there was a removable sleeve held on with a hex key set screw. I am 48 and every day I have a harder time seeing things up close...I removed the set screw, took the sleeve off the shifter shaft and was now able to install the early knob and crush sleeve without a problem... So happy to have a functioning and awesome looking knob once again! It sucks getting old...I hope some of you get a chuckle out of this story....