[Mahler9th]

In my experience, 1/8" or less can make a big difference. The same is true for adjusting the factory parts-- they are functionally and geometrically equivalent.

After a year or two with the WEVO shifter and coupler I bought their clamp. That helped.

In my application, I access the coupler by crawling inside of the car. I usually have no passenger seat in the way.

I have to deal with the roll cage however.

It can be beneficial to have a second set of hands.