Great job man. I've done metal work for years. You are the only one of few that I ever saw do it right. It all locks together if done correctly and more importantly, keeps it flashed properly.
Hey, does a 13/64 drill bit drill a hole through a heavy structural girt, or perlin, or column for a size #14 or # 10 tap screw? If I remember correctly it would be a #10 tap screw, while a 15/64 drill bit would be for a #14 tapscrew, while 3/16 would work for a #8 tapscrew through heavy steel.
I left much mine square. I see no problem with it. Just make sure water can escape thru the bottom J trim. I should have a video posted on my channel within a week on how I installed the metal trim and siding. Just thought I’d throw that out there.
They won’t answer it because they don’t have one. All these guys build these homes for people but never tell you they are steadily fighting leaks until they get lucky it finally works correctly.