yeah, I even have a hard time believing that Gear Cart fits in the back of Ecto-1. Aside from having a tech support person on-site with an equipment cart to hold stuff like an RTV, it would have to be some sort of component to hang on the pack but even then would through off the weight/center of balance unless it’s centered. It’s sort of the same logic of why Kylie in EGB packs their team’s trap on her back and uses a miniaturized pack and thrower alternative in the Proton Pistol.