3ds max: surfacing

i’ve this shape. how can i surface the inside part without using cv or point surfaces? if i create a shape and close it, then i can use extrude, and it caps both ends. this shape is also closed, but extrude doesn’t cap the ends…

edit: i figured it out by myself. i first did lathe, and then cap holes, it worked. BUT, is that the right way? thanks.
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edit2: finished product can be found here: http://www.kirupa.com/forum/showthread.php?t=219339**