This was a very inspired mod I did to help Activators Bumblebee look better.

In the first picture, you can see how the toy originally transformed. His arms are WAAAAY to long, with his fingers nearly reaching his ankles. Needless to say, I decided to try and do something about it. I cut the black piece of plastic that makes the upper arm right above the upper circular part of his elbow. Once you do that the screw and peg act like an additional joint, allowing the upper arm to bend 90 degrees downward.



In the next pictures, you can see the arm bent. Like this, you can now rotate the old shoulder so that the old upper arm points forward, and then use the new joint we created as a shoulder joint. This effectively moves the shoulder up and forward, greatly reducing the length of the arm, and moving the tires above the shoulder instead of below.









This is a super easy mod, and doesn't effect his transformation in any way, you just push the arm back into the original position and transform him normally. I think this looks much better myself, so I thought I would pass it on.