A remix of the awesome cyclotron shell from finchmeister08 on Thingiverse (https://www.thingiverse.com/thing:5182355). This remix allows for expanding the diameter of the cyclotron while keeping the pack's original cyclotron face and windows. Some bondo, or other filler, will be required to eliminate the seam where the cyclotron and the expansion meet.
The author remixed this model.