So I've been using the curt switch ball with my f150 for the past month or so. I regularly tow a few different trailers and need to switch between the 2" and 2 5/16" ball. I got this so I wouldn't have to carry 2 different ball mounts around in my truck, and it fulfilled that purpose. Heres a big problem I've run into though. When it gets cold, due to thermal contraction or something, it becomes really difficult if not impossible to swap the balls out. At first I thought it was rust forming either on the stem or the balls, but I tried the 1 7/8" ball which I have never used and it wouldn't go on either. I left it in my house overnight and now I can slide all of the balls on and off no problem. Haven't found a good solution to this yet. Thinking about trying the reese switch ball system to see if that works better