After reviewing my own file against the in-game file, I realized the scale was way off. I've updated the shape of the model as well as added a bezel around the back button, and increased the size to match the in-game scale.

As some people apparently liked the smaller file, I've left the original file present.

FalloutJetChemV2 is original mini version.
FalloutJetChemV4 is new full-size version.