Backpack/bag unit issue

[Momowarlord]

I want to create a backpack for my hero in campaign similar to backpack in Sunken city. I created a dummy hero, but problem is I can't select it because it has a locust ability. How to create a selectable backpack but invisible?

 

[Chaosium]

Give it an invalid model and it will not display ingame while remaining selectable. In the model field just type whatever.mdl and you're set