I love the original model by SpectralClover0, and the original remix by Chief002 which added the shoulder joints, but after printing I noticed that the backpack was missing its 2 antennae.

I did a quick mock up in Tinkercad using reference images and was able to add some suitably accurate antennae to the model.

I also removed the nameplate because, for some reason that I couldn't figure out, it became illegible after being imported to Tinkercad.

Again, I love this model and all credit goes to the original artist.