Is this something that I should change on my my MK2 that I bought about a year and a half ago??

" The stereo separation problem was due to a 100 ohm being stuffed in the car output circuit instead of 0 ohm - again, this was fixed on the production line & any units that came back to us had it done as a FCO. "

Is there a public posting of service updates that may be needed on older units. I had to install the cap so that my dimmer will work correctly...