Devastator!
Got twitchy and ordered an Overload from ebay. No real markup on the price, but had to pay a penny or two for international shipping. Besides, I've been wanting to finish the figure just because I've been annoyed with the people that got it early not understanding how to combine it, which is part of a larger problem of "early access =/= know what they're doing."
He's wobbly, but that's to be expected for a combiner this size. Full weight of the eight figures is 3.75lb / 1.7 kilos
First, since the wiki page for Overload is already pulling that Lockdown/Lugnut crap about Overload's robot mode only being as tall as a voyager and therefore is small, here's an
ensemble shot showing that Overload's twice the size of the voyager components.
Next, here's the offical arm configuration for Scrapmetal/Hightower, which leaves the left arm longer than the right.
However, you can arrange them differently so that the arms are the same length at the palm pretty easily. Fingers are still longer, but that's fine.

Official configuration really only allows for an upright, biped posture on account of the neck and the ankles. Those are simple enough to work around for the quadruped posture. To give the ankles clearance, the thighs need to rotated 180 degrees. It's actually easier to disconnect Rampage and Longhaul than try to rotate the feet while attached. Also notice that Rampage's stand goes between the treads to help hold the foot together, just like the vehicle mode.


Re-configuring Mixmaster so the neck and head has an upward pivot is pretty straightforward. The truck grille won't fit where it's supposed to, but is actually better sitting over Scavenger's head. It hides it and is more flush with the rest of the back.


Boom, gorilla pose.

And, since I wanted hoses and a more defined hump, I worked out a way to toss in 2009 Rampage and Studio Bonecrusher too. He has a tail now.




I did that because I've done that with the little one since always:
Overall, I'd say my impression is thrilled, maniacal laughter. Every component has triple duty (vehicle, robot, combiner), but the necessary compromises are spread quite evenly and the negative effects are slight (Mixmaster's hands in truck mode, etc.). And it's doubly amazing because the ROTF Constructicons are such a
weird, motley bunch, and Devastator himself is such a different body type from basically every other gestalt they've made. It's just... so outside of the norm in every component configuration, and yet they pulled it off. I am duly impressed.
EDIT:
I figured out that if you disconnect the two wheels that make up the back, the arms can swing forward and make a much better gorilla stance. It's not very stable, though.
https://imgur.com/a/aWBWiGu