I printed mine 9 months ago (April 2018). It has proven to be THE most useful thing I have printed so far. I use it frequently for soldering jobs (been doing a lot of that lately) and it is holding up very well.
Mine assembled fine with no issues. I ran a 12mm tap along the threaded portions to smooth them out a bit; it worked okay off the printer, but the tolerances were pretty tight. After cleaning up the threads, the movement is much smoother.
I just wanted to share that and give thanks for a great design!