Comment by cubano

Anytime you can turn a deep personal interest, like designing and building this impressive gearbox, into something that lands you a paid gig somewhere, you have basically hacked the typical employment system and you should be happy and proud that you saved all the time and expense of a 4 year degree to get what you wanted in the first place.

Now, it remains to be seen if this project will land you a professional level paid job doing what you seem to love to do, so I think the whole "engineer" question is still up in the air.

Yes, anyone can call themselves an engineer but I believe, in the West at least, that until you graduate from an accredited University or have 3-4 solid professional industry experience, calling yourself an engineer might be considered premature.