Well, if your having problems with the image being small on the TTC gallery, then this is what you do:
Once it gets accepted, if the image is smaller then the original, just click on the image. That will make the original-sized image show up, and you can use that code.
What the TTC Gallery does is make any big image smaller, so it will fit better in your posts, but if you want to show the original size, just do what I said above.
Hope this helps.
