Review on Iverntech MGN12 400Mm Linear Rail Guide Upgrade For Ender 3, Corexy, Tronxy, Delta Kossel 3D Printers And CNC Machines With Stainless Steel Carriage Block by Ryan Dillon

Bought twice in two weeks (misread description) and one set needs little lubrication. The second set that just arrived slide PERFECTLY. This is for a 3D printer that, due to out of town work, has been a two year project. This product has been a great kick for not only inspiration to complete the project, but also confidence in tightening up my X axis troubles.Some MGN12 may need some cleaning and lubing out the gate, but I can confirm some are perfect as is. I still plan on cleaning and lubing anyway to be certain everything is fine from the start, so don’t let the negative comments dissuade you. So units may be bad, but even more people are lazy and like to complain. Buy from this seller.