I upgraded from a 12 and first thing I noticed is how much heavier it is. My forearms are sore. I looked it up and it's one ounce heavier than the 12. Is the weight something I'll get used to? I like everything else about it.
So I figured it out - it's less the weight - it's the heavier/larger camera at the top compared to my old 12. Gravity makes it pull down a bit more at the top - that's what the issue is. Today it's better - my wrist is getting used to it so I'm hopeful.