Hello, hope you can help me Im starting to build my own cnc machine for aluminum and steel, trying to maximize precision, belt drive its out of the equation which leaves us to ball screw and lead screw. I know some ups and downs about each other but what concerns me is the price versus the actual work. Based on that, i know that for cutting steel the machine must not have play at all, so, can the body of the machine be made of v slots? Or can it but reinforced with steel sheets? Would you recommend lead screws over ball screws?

Would you recommend this? Im trying to build a 3' x 4' CNC router.
Sorry for my bad english, not my native language.