Rhino/MS18 Mk2/Mk3 with V18-1000

Firstly am i right in thinking that the Void V18-1000 is suited to the Rhino MK2, and the MS18 MK3?

I was sold a pair of Rhino MK2's, however im not entirely sure if they actually were Rhino's or MS18's (they were built buy someone after the Rhino plans were withdrawn, and i believe there was some confusion).

I believe the Rhino and the MS18 are very similar, but that the mk2 versions are slightly different? 

In which case is there any way to work out which my scoop is and whether i can use the V18-1000 in it or if i should mod it into a mk3 first?

(up till now I've used them loaded with Fane 18XB)

Cheers

You sayin Rhino mk2 is fine, or that mk2 of either rhino or ms18 is fine?

and mk3 gives higher spl, but wouldnt work with the voids? or that i should mod them to mk3 to get a higher spl with the voids?

Cheers