I purchase the larger paddle shifters for my 2006 M3. I got the left one on--the right one is NOT cooperating. Does anyone have any suggestions or any tips or tricks on this install? I tried putting the old shifter back on--it would not flex. I thought I forgot to put on the spring, but it's there. Again any tips? This should be a no brainer but I am having trouble. I would appreciate any help--thank you!