Hi Billabong,

re:
> I have been racking my brain for 3 days trying to get this be a solid body. No matter what
> I do. I just cant get it and would really like some help on this please.

So the first step is to look at "naked" edges, which are edges that only belong to one face instead of being joined between 2 faces.

You can select naked edges by either setting up a shortcut key as described here: http://moi3d.com/forum/index.php?webtag=MOI&msg=6051.2
or in v5 you can do it in the UI in the scene browser under Types > Edges > Naked.

If you do that on your model these edges will highlight:



So those are the areas to investigate for potential problems.

The easiest thing to try at first is to separate out the surfaces in those areas and use Edit > Join to glue the pieces together again.

You can do that by selecting these 4 faces:



Then use Edit > Separate once to break that section out, then Edit > Separate again to break it down into 4 individual totally separate surfaces, then Edit > Join to glue the 4 surfaces together, then select the main piece as well, then one more Edit > Join and that is enough in this case to get a solid.

Sometimes the object may need some repairing or reworking in the places with naked edges but that doesn't seem to be needed in this case.

- Michael