I bought these designs by accident with the CNC DFX file, but really wanted the super GF Design. Frank and Lisa are great people and sent me the correct files. However after looking over these files, they are exactly what you need to build with hand grinders and tools. Design made so the average person can do these. You don't see that very often. He has it all laid out for you with part numbers to boot. I am in manufacturing so have access to machine shop as well as laser, waterjet and plasma if need be so the cutting will be easier for me, but you don't need these to build from his designs. I can't wait to get these plates on the waterjet and get started. I see getting the insulation is going to be the only hiccup for me. The cost for design is a great price!