hey guys, i'm starting to think about making a small cnc machine possibly around the 15" x 15" size, my original plans had me doing a 4ft x 4ft but i can justify the costs until i make and learn a smaller machine.


so my question is at what point should i steer away from a straightforward round rail and got to supported round rails. my hope is that with a machine as small as 15 x 15 i will get by with round rails and keep the cost down.