I am currently following this youtube video guide to install my internal bottom bracket.
I have followed the guide successfully through 2:18~. I have uninstalled my old bottom bracket, cleaned the area, greased everything up well, and screwed in the non drive side cup a few turns. I am now currently trying to install the drive side of the bottom bracket, and for some reason after a couple of turns it just gets stuck and is really hard to turn all of a sudden. Does anyone know what could be the problem? I don't want to force it in there before I find out something about this. Thanks.