[What is the best option for mirroring objects?]

I've finished a nice mesh shoe.  The problem is, it's designed for the left foot.  Is there a way I can flip the mesh in world or do I have to upload a seperate collada file?  I am aware there are scripts for this sort of things in the marketplace but they cost more $ L than I have at the moment.

[Lost Cause?]

Amazing!  That completely fixed it!  Thank you sooo much!

[Lost Cause?]

Hi there.  I've been experimenting with Blender recently.  I'm going slightly insane. :)

 

Alas, I finished a boot through some probably frowned upon unconventional ways of building things.  I used grease pencil to sketch the rough design and knife to cut the shape out of a cube.  Then I just started shaping...  The product is pretty but it's got roughly 2300 Verts and Faces.  When I try to upload the collada file to SL, my mesh comes out with holes and missing area...

I know I didn't follow the constraints but I'm not sure if this is the issue.  I'm miserable at Blender, I know.  I promise you, I'm hanging my head in shame as I type this.  But it's a pretty cute boot for one days experience! :(  I'd really prefer to not have to scrap it.

 

Can anyone shed some light on what the issue is with the mesh holes and give me some suggestions on what could fix it (if that's possible?)

 

The boot of which I speak.