We added new features to improve the usability of dependent / child equipment linked to a main equipment:
You can restrict the main equipment list to one of more groups. Go to the Equipment web app and tap Options on the left pane. Then select one or more groups. It means it is easier when you edit a dependent equipment to change its parent equipment : fewer items will appear on the combo box.
Easily add a dependent equipment from a main equipment view screen on the web : tap plus button on the toolbar, then Sub Equipment. You can then select a group and a dependent equipment in the combo box.