Don't want to sound like an angry lawyer but whilst building your own frame is to be admired (providing your engineering, materials and welding are top notch) but 'dimensionally ripping off' a commercially produced item technically infringes makers copyright. The whole point of a self produced frame is its your creation and doesn't rely on critical dimensions from someone elses! These things are created in a jig - you place the engine, configure where the headstock needs to be with proposed forks and wheel and where swingarm pivot needs to be using whatever s/arm and wheel - then glue it all together with whatever collection of tubes you choose. Just saying is all!