Thanks for this feedback! I admittedly am not sure, to answer your last question. I am approaching it as one of those "I will know it, when I get there" sort of thing - example: i have replaced (successfully!) individual gears within a 900cc inline 4 motorcycle engine, I have performed the replacement of many different systems / components to home HVAC and larger appliances (without any formal training - some of these endeavors took longer than the aforementioned motorcycle transmission work, due to lack of instruction/schematic access). Would I do these things again? Absolutely not! But I'm a little stubborn as I will try and complete something to best of my abilities and will either reach a cognitive or personal initiative limit.