Well i got this B&M short shifter for my E90 335i.
It's should have been a easy install but found a problem.
The lower ball robed on the drive shaft damper.
And this only when in 2nd, 4th or 6th.
I had to shave the ball a bit to clear it.
First picture is the grinding it did while driving it.
Then the 2 others are after i grinded it lower and on an angle, since it only rubed when the shifter was down. (2,4,6th)
After this grinding it works great.