So, two in our community came up with fixes which they sent us and we in turn share them with you.
This Bumblebee fix comes from Carnivius_Prime:
Carnivius_Prime wrote:I put a thin layer on the insides of the clear plastic joint (after having removed that whole roof piece from Bee) with just a smidgey bit more on the tiny bumps that supposed to fit into the tiny little gaps of the yellow piece. I let it dry for a while then put it back on and it fit much tighter. Of course a proper pin the way through like you say would have been nice but this seems fixed enough for me.
I even just held him up by the roof and shook him a bit and it's still fine.
This mod for Blackout's hands comes from Hip-Hoptimus Rime
Hip-Hoptimus Rime wrote:
I pulled his hands off and mounted them back on the arm 90degs over. It's not pretty but I think it looks and works better.
I modded them so they are now vertical instead of horizontal, i.e. in a more natural position. They still pivot up and down, but the hand is now vertical. It's not easy to get that wrist pin out, and the end result is not as pretty as I would like (the hands are now visible in alt mode, almost exactly like the Voyager mold), but it works. Once the wrist pin gets pulled, you drill a hole perpendicular to the original hole so it intersects it. It should be near the middle of the cylindrical section, just about in line with the base of the thumb.
You'll need a small screw to secure the hand through the inner pin bracket and the new hole, so the hand pivots on the inside of the space where the hand was originally. This leaves some empty space, which you can fill in by gluing on some little bits of kibble from some other robot or whatnot (I haven't done this yet). There is some minor trimming involved to get the hands to fit nicely in alt mode. You end up with the hands visible, much like the Voyager mold, but they look like helicopter equipment to me.
Interestingly, once you have the hand off, there is another way to mount it so it pivots side to side, instead of up and down. Just drill a hole for a screw in the rear edge of the flat body part of the arm, near the Air Force emblem. Then screw into the hole for the original pin, rather than the new hole (if you've already drilled it).
Hip-Hoptimus made other mods to this figure, which can all be found here.