Delta Roller

My first printer was a Voxel OX from Open Builds. Its been running for two years and I have been thinking about a large delta build. For stability I wanted no plastic parts in the frame. I have followed other builds and for this size printer most are using materials custom cut on a CNC or water jet. I could not justify a $20 13" x 13" x.125 build plate being custom cut for $150. My top and bottom plates together cost $40 and would have cost another $200 to have them professionally cut. So the ba