Custom Star Wars Mandalorian USB shell

I took two different files that I downloaded from Thingiverse and merged them together using 3D Builder. The first file I used is the Star Wars Rebels USB file by http://www.thingiverse.com/csala92. The second file I used is Star Wars: Mandalorians by http://www.thingiverse.com/dSASQUATCH707. I did a little editing myself to get the look that I wanted plus a littler bit of resizing to blend everything together. I'm still new to this so please feel free to leave a comment to let me know how I did, if I did anything wrong, and what I need to work on.