Thanks for the detail Bricol. The bearing rotated smoothly when it was stuck in, not so sure after wellying it out, although I haven't checked. I spoke with Derek at CC this morning and he has confirmed they should be installed in the carrier, as a result he is sending out a replacement set installed in the carriers. This heating them up process, are you saying if i heat them up in the oven as per previous comments they are just going to drop in? When I got the damm thing stuck I did use a hot air gun on it, I guess not hot enough though. I guess there are solutions to many of these issues, but having little experience and only the expectations set by CC in terms of "basic tools" and if you can do flat pack you can build a 7, heating stuff up in an oven isn't exactly the first thing I'd think of.