I am thinking of building a cnc router. I need it to cut the shape and holes in .063 to .090 aluminum sheets. My project will be a tube amp chassis. The largest folded chassis will be 20Lx8Wx3H with a .75 to 1 inch mounting flange folded to the inside on the 8 inch side. The unfolded sheet would be 28x14. Some times I will need to cut out the shape and cut the holes on a flat sheet and then have it folded. Some times I will need to cut the holes on the top, front, rear and bottom on a pre folded chassis. Can I extend the reach past the end of Y axis by 1 to 3 inches to machine the 20" face or will I need 8 inches of clearance on the Z axis or can I slot the base board large enough to insert the folded chassis from below? I will also be using it to drill garolite. These holes can be drilled rather than machined. I would also like to use this machine to cut box joints or dovetails on up to 3/4" plywood or pine. How much motor do I need? Should I use a router motor as a spindle? Is this a good use for a laser? If a laser is good, how much power will I need to cut both plywood and aluminum? See the attached pdf files for a sample of the chassis.