It is because:

1. I wanted to be able to see it clearly.

2. It just fit better right there.

3. I like it there.

Last pic....

Another picture.....

This is the first cannon I've built in at least 10 years. It's pretty straightforward, with the fan batteries under the side panels. This is a rough draft, as I had no idea what to expect. I plan on building a sleeker, cleaner version when time allows. And yes, it does need a longer barrel!