Hi, I was talking mainly about the apps, because you said you saw preset models. Sketchfab_vr_carboard app ís for the preset models only. So that one you don't need.
I assumed there should be another app also for all models for you to be able to find. The one where I can find all models instead of just a few preset models.
I was talking about the controller because most controllers for my samsung phone weren't working properly, bluetooth crashed or the controllers could not do the things on my phone they should be doing... but perhaps your controller works fine with other programs. I tried the google cardboard with magnet... that goggle really does not fit but the simple magnet on the outside worked best for clicking.
When I put my Samsung smartphone in some goggles, some were touching the screen or buttons while doing that which started or closed programs etc, but some goggles did not. I finally adjusted a goggle so it did not touch a button on the side when inserted.
And I use now a controller where I can click at least (which still does not work on some programs for all options).
I don't have much experience with the other things.
This is also a new page from SketchFab where you can find models on your own profile:
And I found this page but perhaps you did found that already.