So I am trying to figure out what software I will be using for my CNC router. I am planning on using Sketchup with Sketchucam for making designs and getting the gcode. I am planning on using arduino mega and I already have a ramps board and drivers. My main question is with a machine controller. There doesnt seem to be any good ones for the ramps board for CNC, they are all for 3D printing. Would grbl be the better option? Anyone have experience with linuxcnc and arduino? Does it use the grbl shield?