While I applaud the effort, this sort of thing suffers from the same problem any "quick introduction" to something rich and complex has: it's easy to see the complexity and discern the unfamiliarity, but requires effort to discern the value. No one has ever been convinced of the value of TeX/LaTeX, Vim, Emacs, Awk, Lex, Lisp, etc. by a fifteen minute intro. They're convinced by pushing themselves (or being forced) to use the tool for a substantial period of time (usually weeks) over several significant projects until they discovered the familiarity, power and utility that it affords people who are sufficiently familiar with the tool. In a machine shop, a lathe isn't an obvious choice for a project until you already know how to use a lathe.