In example equip the Walrus:
I placed the armor at slot #4
Then I placed the Hacking device at #3
the Armaor @ #4 vanished.... But why?
When it has to do with max. payload then why the heck isn't this displayed?
Same for the weapons.
At Mantas same precedure.
I vote for an drag'n drop solution, which shows me immediatly when my action will remove a current installed item.
The small solution would be to implement a warning when I click on a new item which cause an already installed item to be deinstalled.
Hope my German/English is understandable :-(