Wow, this solution is so simple and elegant. I can’t even believe it works.
Joshua literally glued a golf tee and paperclip to the trigger with hot glue. The angle that it is mounted allows it to work as the trigger, but also, when depressed instead of pushed, it actuates the bumper. Brilliant.
He is winning with this exactly the way it is, though I do intend to make a 3d modeled one for uploading to model hosting services.