Hello CT, The story began when I bid Andretti on eBay, strangely enough it has 1 HL and 1 HEL end link. I sold the Andretti head and kept the Double Grain BoR for my Carrera 2447NST. Currently I am using unmarked 18mm end links for my Carrera 2447NST. I also use Squinky's nice generic BoR …