VEVOR Linear Guide Rail Set, SFC20 1000mm, 2 PCS 39.4 in/1000 mm SFC20 Guide Rails 4 PCS SC20 Slide Blocks 4 PCS Rail Supports, Linear Rails and Bearings Kit for Automated Machines CNC DIY Project

Please could you tell me if the rails can be cut shorter without effecting the straightness? I assume a bimetal blade in a hacksaw would take a long time but would work. I would like a rail of about 650mm but no rails that size are in stock. Thank you.