As someone in the middle of my full suit build, failure is your best friend to learning. I have failed on the most easiest mistakes, expensive mistakes, and hard to notice mistakes. Even when I finish I'll probably have a mistake or two, but that's what makes it such a great learning experience!!! Don't be afraid to mess up.
For armor Smith what I have come to learn is check your measurements at least twice before printing and save 2 different model sizes incase what you print is to small or to large. Change the variation originally in armor Smith to go both ways. It saves soooo much time
I'm looking forward to see what you come up with!!