Some extra Pix:
You won't need this many but I usually start more than one horn at a time. Notice the tip of some are rounded off or pointed, that makes it fit in the horn a little better. You can cover the tip if you want but it isn't necessary.

Here are a few examples:



Jamming it it against the wall:

There are a couple other methods that may be needed, it all depends on the horn itself but this will work on 99% of them. Any questions just ask.
Tim C.