Hi Godmyfortress, It is very accurate, maybe you mean it's not a full explanation of Sola Scriptura (I would concur).
Although RCC say that the bible is inerrant, infallible and as you state material sufficient. They put the magesterium (ex cathedra) as Infallible, thereby they elevate the magesterium (ex cathedra) as the sole authority on all things relating to faith. Therefore scripture itself is not 'all' sufficient (material sufficiency). And of course this is how they get around with all the false teachings that they have.
Whatever ever clever way people try and frame it. The RCC hold that scripture is not sufficient on its own. Which is contrary to what scripture itself teaches.
They are in error on perspicuity.
(I understand what you are trying to say
)