I got an MP-11 not too long ago as my first Masterpiece seeker. While I really like it, the loose chest does bring it down quite a bit. I don't know whether there are any "fixes" out there already, but I figured it shouldn't be that hard to fix myself so here's the first 3D print I've ever done:
Luckily it seems I got all the measurements right on the first try as it sits rather well, and if I paint it grey it should be quite discreet too.
So now Starscream can hang upside down
It's not the most elegant solution, but at least this way I don't have to physically modify a quite expensive toy.

Luckily it seems I got all the measurements right on the first try as it sits rather well, and if I paint it grey it should be quite discreet too.

So now Starscream can hang upside down

It's not the most elegant solution, but at least this way I don't have to physically modify a quite expensive toy.