Hi Colin, when CustomUI for v3 is installed it has a folder at:
C:\Program Files (x86)\MoI 3.0\ui\customui

Inside that folder there are several .htm files, each one of these files will get loaded by CustomInit.js and will generate one or more buttons on the bottom toolbar.

So if you don't want a particular set of buttons, remove the .htm file from that location and then that set of buttons shouldn't get generated.

If you can't find the one to remove there, please post your CommandBar.htm from the folder C:\Program Files (x86)\MoI 3.0\ui so I can see if those particular buttons have been added directly to the UI instead of set up as a loaded CustomUI module.

- Michael