I am going to be making some of the molds like specified in the Lowes DIY project. I don't really like how they have their ends permanently secured so I would like to do more of a carriage bolt setup like I've seen brambleberry and others sell. I've never seen one of those up close and I was wondering if anyone who has one could explain how it's setup or even better provide some pictures. I was thinking if I were to anchor a threaded rod into the end pieces that drilled a matching hole into the sides I could use that and a wingnut to keep it firmly in place. I just want to make sure there's not an easier way that I'm missing. This will be my first woodworking project, so I'm by no means an expert.