In my quest to find out more about meshes I found this:

"Distant Unicorn (History|Contact)
Oct 27, 10 6:25 pm
Draw me an extruded pentagon in NURBS (perfectly quadratic mesh too) that only uses 7 polygons (quads) and I'll LOL to the I'm-Sorry-I'm-Wrong-Bank."

I made an extruded pentagon with Moi and it did indeed have only 7 polygons. Probably a bit late to tell Distant Unicorn though.

PS Does anyone know of a page that will explain to me what I should be trying to achieve when exporting a mesh from Moi? Sometimes long triangles seem to cause problems and sort of pinching in places (mostly around holes) and to avoid this I try Ngons. Ngons make lovely smooth surfaces but confuse some programmes into adding extra surfaces. Its very puzzling and working neither in the computer or design industry I have no one to ask and few options for experiment.