The Ex1 and EX3 are both not very ergonomic. I have shot with both. I tried every imaginable attachment made from varizoom media rig to other products to help stabilize them and no good options. the ex3 is not balanced despite cliams of semi shoulder mounting. Lens is heavy.
I tried a grip from manfrotto. It seemed to really be the solution as it wasn’t expensive and it allowed me to handhold without wrist fatigue. Guess what? The screw mount for the tripod adapter cracked and now I am ordering a new one through sony $40. It seems the tripod plate screw is too flimsy for these adapters. So beware! you could end up having the plate rip out and the camera fall to the ground.
Solution. Sony makes a durable plate since you have to have some kind of adapter to handhold.