Not sure if this the right forumn. I'm fairly new to CNC machines. I am pilot and have spent considerable time researching inexpensive options for general aviation aircraft. Molded composit experimentals are some of the nicest aircrafts out there. People spend large ammounts of money designing the plane, having molds built, setting up shop, ect.. They create huge overhead and then, when they realize the demand for molded parts just doesnt support there buisness, they file for bankrptcy. My goel: Build a CNC machine capable of carving a plug, for inexpensive mold production. I want to be able to produce a small 2 seat molded aircraft, while keeping overhead at a minimum. My machine needs to by 20'x5', and have a 30" z-axis. I have the mechmate plans, which should work for the x and y axis, but I need help on the Z.