Making a surface grinder attachment and permanent magnet from start to finish. Surface grinders are used to make things flat. This DIY one I built is capable of grinding flat within 0.1mm (more like 0.05mm) wich is enough for what I’ll use this for, I might be able to get better results with finer grit belts but all I have for now is 40grit and it’s already adequate for my needs. Permanent magnet is made of 20 strong neodymium magnets size 50x10x5mm and can hold at least 10kg of pulling force overall. Linear rails are 500mm MGN12. Probably not the best kind of slider for this application but it works for now, we’ll see how they stand time and dust.