Review on 300Mm European Standard Anodized Aluminum Profile Extrusion Linear Rail V Type 4040 For 3D Printer, CNC, And Laser Engraving DIY Machines - By Iverntech by Lloyd Rodriguez

I have bought several of these over the course of a few years and the ends are never square leaving me to trim the ends. Not to mention a few of them were twisted around 7 degrees down the length.I never knew they were so bad until I really started looking them over carefully and put them on a surface plate.Needless to say that I will be cutting my own from now on because I need my builds to be square and true and there is no point in paying premium prices for these pre-cut pieces if I have to cut them off so they are square on the ends anyway. I can get 3 self cut pieces for the price of one of these that way and the ends will be good to go.