Ok, what's the upgrade/update here, you ask?
That's the upgrade/update.
Technically, somebody thought that it's not enough to upgrade Swindle and Blast off - Brawl needs a re-scan too...
...and here is the 're-scan', Power Core Combiner (PCC) Commander Autobot Heavytread.
I'm no tank expert, but this looks very much like M1 Abrams Tank (The one used in the movie.)
Here's his robot mode.
The upgrade/update works by some 'minor tweaks' to the tanks 'rear end' and then pulling out the connector from the orginal bruticus combiners. I prefer the original brawl or swindle to keep them color coordinated. This one's from swindle.
If you want to do this upgrade/update, you might want to consider the fact that Bruticus foot requires two pegs and Heavytread has only one peg.
Consider also your customizing skills. I thought that should be easy, but I ruined one connector prior to this one. You would also need to be creative on doing that center tube on the connector - I used a tube from a ballpen that fits almost pefectly on the pegs on Heavytread, just needs some instant glue to adjust.
Lastly, you might want to consider the fact that Heavytread looks thinner and shorter, so even if you get the height just right, Heavytread would still look somewhat off.
For me, I do not recommend this update, for aesthetics alone. I wish vortex was the one who had the upgrade, making him more G1 looking. Well, we'll see if we can do that.
Thanks for reading!