I'm looking to upgrade my November 2012 Mendel90 to the latest and greatest version. The only real issue I'm having is some slipping on the left Z-axis motor-rod coupling. I think that I over-tightened the coupling way back in the initial build. The slipping doesn't really cause issues except that I have to adjust it before each print. So that's where I want to start my upgrade. That and it looks like a simple fix that will only have my printer down for minutes once I've printed new couplings.
Free shipping of electronic components from China has spoiled me and I'm having troubles coughing up $20 to ship the tubing when I only need 32mm of it. Has anybody found a decent source of it in North America (Canada would be even better)?
