Almost anything will work for a 3D printer you are not doing anything serous with hobby level 3D printers, you sound like you are reinventing the wheel as all these types of guiding systems have been well tried out by most hobby builders, which move on quite quickly once they see the results, you don't have to use Hiwin there are may much cheaper that will do the same job, you have to choose carefully though with the cheaper rail sets, the steel round rails work well for 3D printers and don't have to use supported rails because of the low loads, so you have lots of choices, The IGUS bushing system they use is not reliable and not easy to get adjusted correctly