Correct. However, you actually don’t even need to use montages, you can play animations directly by doing this (just tested it out):
I haven’t tested it extensively… but you may need to play with the anim graph a little to reorder things around if you are trying to animate the player’s bottom half as the blending for aimspaces may over-ride the animation, but again, more testing would be required. But for things like reloading, firing, melee swings, etc. you’d be set 
It’s worth noting that a bug was brought to my attention today in which using items on the host is causing the client to become unpossessed… So that is an issue getting in the way of this, along wiht other things. A bug fix for that will be available in the next day or two (very easy fix).