The firearms industry is (I feel) is very rewarding to take a chunk of metal and turn it into a work of art the everyone wants to buy is to me a reward in its self,. I have never worked in a manufacture but have been involved for over 25 years. It is not and easy or cheap ting to get into first there is machining involved in most of the aspects,lathes, mills,surface grinders just to name a few. Then there hand tools, files stones various hammers and on and on. There ae several collages that have courses for this field and I have seen one (can't remember which one) where you build a 1911 at home. How did I learn, I went to the gun shows and talked with a lot of people and yes was told all kinds of things like that's a trade secret. Until I meet a gentle man how was older than me by about 50 years who sold 1911's. I said I heard that they are not that accurate, he looked at me and all he said is 1" 50 yards I guarantee it. that's when I bought my first Colt Series 70 and fell in love. Mr. Russ Carzink was his name and he was willing to take me under his wing with the 50 years experience of his, the first time I wrote a barrel hisaye gleamed and said how many did it take for you to get it right, I looked at him and said that's my first one, good he said here's your first slide open the ejection port. Well home I went with a smile, back I went next week . And asked well? He grinned with his cigar and said the price of scrap cost you 50 bucks want to try again? 200 dollars later and I got it right. form there he taught me how to properly fit a slide and I am a firm believer that you don't squeeze one, you peen the frame. It last a lot longer and you customer is more happy. Good luck to both of you, once you try it you'll never go back .