So the title of this tread should really be.... "How to Cheat the Airlines Carry-on Rules" instead of "How to Meet the Airlines Carry On Rules" . You could also just go to Amazon and buy a fake Santa Belly and A Fake Big Butt and cram all kinds of stuff in there....
I can say with confidence that if I try to board a plane with my plate carrier crammed with hoses, first stages, SPG's, computer, etc..... that it's probably gonna cause more problems than I'm trying to solve.
But in reality, and admittedly, if I am a few lbs overweight on my carry-on then I just put some heavy items in my cargo shorts as they can hold a lot of stuff.