I think I need to update my age old sound equipment.

I'm sure this belongs in the category of silly questions, but the only way to learn is ask.

Kadee and other vendors offer couplers that have over-, center- and under- bars. I understand (and use) these as needed to make my rolling stock meet specs. My question is: do these over, under & center couplers exist in the real world or is this only within modeling to help us make things align properly?

Thanks!

While I'm waiting for Dave at Backdrop Junction to print my order for backdrops I wanted to make some kind of progress on the layout so I decided to do some track painting.  I don't have any special method, but just follow what I've seen here on MRH and in some books and magazines that I've read.  The only thing that I did was custom match the rail color to an actual photo of track.  My tie colors are a mixture of flat Testors colors.