I installed the Flaming River lower shaft yesterday. What a f@*Kin b^t%H! The splined female end on the Flaming River lower shaft would just not slide onto the splined male end of the Ididit Colum. I counted the splines to see what was up and yep, they were the same. I even used calipers to make sure they where the same diameter. Yes they are, although a little too close. I called Ididit and they said they have seen this problem before with the flaming river lower shafts. They said that it is a machining tollerance issue. So I pulled the colum and installed the flaming river splined section with a little heat and a lot of persuation. What should have been a 25 minute job took over 3 hours! The story of my life. Ididit recommends Borgeson (sp?) joints only with their colums. I wish I would have known that before!