Here's a somewhat easy fix for your Breakaway to get his head moving and the neck joint able to lift up I found the landing gear kept his upper body/nosecone from moving all the way down and the front windshield needs to be carved underneath, the back of his head too so he can tilt forward. Also, acetone the top and front of his lightpipe eyes and they'll shine clear blue again.
And here's one to keep Sideswipe's chest from unlatching constantly. You just need to create some pressure by sticking something about the thickness of a playing card or two in the gap where the windshield folds down against his back, thus jutting the chest forward a bit and the latch works.
