Stagger Ribs - no inserts?

[Hallsy]

I've heard many people say not to inserts with stagger ribs.

Is this for all surfaces? Can anyone comment as to why?

I've fitted some up to some B2 wheels (same width as trimmed B4 front wheels), and the side wall seems to bulge a bit, tyre doesn't seem to have any real support. Do they not just squirm around a bit without inserts?

I've not tried them yet, just thought I'd ask before I glue them!