Two years ago I bought a Korona 8x20 off the evil-bay. Unfortunately the rail was only 18" long and my shortest lens that covered was 19". So I looked into getting Richard Ritter making an extension but decided it would be "better" to get a 355mm G Claron, instead. I kept the box the korona came in against the day I needed to mail it to Richard. while mining the box for styrofoam peanuts for Christmas present wrapping I discovered a little box under the peanuts. Inside was an extension rail. Looking at the ebay print out the seller included as a receipt there was nothing about the rail in the text OR the photos. Did perhaps Santy Claus come to visit? And which of the last two Christmases did he come? Wooohooooo Now if only the rear standard didn't wobble like a drunken sailor . . .