Moving forward with my goal of giving my Printrbot an upgrade and washing away its downfalls. I took a concept from my previous CnC build. During my CnC build I have to solve a problem with backlash and I came up with a great idea that can be implemented into the Printrbot setup. It consists of two nuts. One of them a standard and the other a longer nut, with a spring mounted in between. This will put pressure in apposing forces helping to eliminate any slop or play. It works real well for my CnC and it will fit well in the standard Printrbot printed parts. I will post pictures asap.