Why does a discussion like this turn into a "lets bash the engineer" tirade. During my career I didn't spend a lot of time beating up the mechanics, assemblers, service tech's, welders and MACHINISTS when something didn't go according to plan. I am here to learn how to machine parts, fix/run equipment, not to read posts about how bad I am because of the job I did to earn a living. I bought my first welder 2 years after I graduated from engineering school for several reasons. First and foremost I wanted to be able to fabricate parts for my car hobby but I also wanted to have a better understanding of the welding/fabricating processes as I was designing undergrounding mining equipment which had many welded structures (frames, buckets, loader booms and linkages, etc.). I am a "seat of the pants" fabricator and also, I guess, engineer. I purchased my mill and lathe to better understand the machining process by doing it myself. I am not experienced at machining and at my age I won't have enough time to get really good at it but I have a lot of fun non the less. To visualize a design I have to use a computer as I just don't get the paper thing. That's neither good nor bad, it's just how it works for me. I don't put down people that use paper just because it doesn't work for me. I can't help it if you had a bad experience with an engineer sometime in your working career but don't automatically rubber stamp them all as a result. I've had mechanic's berate me for the way I designed something but they also had never been in a mine and actually saw how the machine was used. What might have made their job difficult was required to make the machine survive in the field. If it broke they called me to fix the problem, not the guy on the line who built it, so I had to be happy with the design. It was my ass on the line, not theirs.
Sorry for the rant.