PRB2; while i don't know your skill level, my thought's are, beginner! I'd go ahead and grind 95% of the final shape. Then use the file to bring in the final shape. Personally, I'd add hammer marks at this point to show authenticity. Heat treating however, is beyond my scope. BUT, i'd would 'do it right' the first time! As your skill's advance, this tool will be more useful. Do it 'right' now! It'll pay you back later!!! Perhaps, someone else will chime in on this.