Razor Crest
the first step is to download the file and put it in your 3D
printer splicing software. here is the STL file so you can download it and 3D print this model.
https://www.tinkercad.com/things/8SrnMkiXlTf
Supplies
3D printer and PLA plastic
3D Printing
while 3D printing you have to use supports and sometimes the right support will fall out while printing but that is ok just let it finish printing and cut off the extra material. the left engine may look a little weird on the bottom because of this but it's ok because it is the bottom (no one will ever notice).
Magnet
next you have to glue a magnet to the bottom of it if you want it to be a magnet.