Plugged-I-bundle conjecture for non-orientable Seifert fibred spaces

A non-flat non-orientable Seifert fibred space over $\mathbb{R}P^2$ or $\bar{D}$ with two exceptional fibres is a Seifert fibred 3-manifold in the stated class, where $\bar{D}$ denotes the relevant disc base orbifold, and a minimal triangulation uses the fewest tetrahedra for its manifold. A plugged thin $I$-bundle and a plugged thick $I$-bundle are the two specified triangulation types. Plugged-I-bundle conjecture. Every minimal triangulation of such a Seifert fibred space is either a plugged thin $I$-bundle or a plugged thick $I$-bundle. This is a structural conjecture concerning minimal triangulations of a particular class of non-orientable Seifert fibred spaces; the supplied source does not report a resolution.