After inquiring about the hose length on the proton packs, I did wind up trimming this down some, as it was too long.
I decided to make my prop proton pack a slightly different version than a movie replica, I wanted it to be unique to my character, and I wanted to add slimer on my prop.
It was fun creating my prop proton pack, I get lots of complements on it when I wear it as I'm cosplaying.