So i have ordered ballscrews and now am thinking about the rails....shouls i just buy these CNC Set 20x 800mm 4x Linearwagen Linearführung Linear Guide Rail 3D Fräse | eBay and place them where the momus cnc had its rails or just find a way to make the cold rolled steel straight >? at this time they have a 0.35 mm bow in the 800 mm distance (tried it with a string tensioned and feeler gauges go under it )