Hey Daniel, Thanks for building and uploading this prop! I noticed when building mine that as others have stated the rectangular posts are missing from the battery pack. Another thing I noticed is that the holes for the light and toggle switch are also on the left side of the pack not the right. This piece needs to be mirrored before you print it. I've fixed this part and can send it to you if you want...just let me know. Thanks again for a great prop!