Hmm, no i am not sure, it was quite a while ago that I weighed it. It might have been 6 or 6.5. Id try and weight it now but it would be low since there may still be some pieces scattered in the grass.
If that was it, it sounds like the twist will come in about the same weight. I think the last time I had weighed the UCD was after my first split and I had done some pretty heavy epoxy work to repair as well as to fix the LG block. After my second split I did a much better and ligher job with my fix but never weighed it.