Remington Model 10

My brother in law picked one of these up for a hundred bucks. We shot it today and it seems to hold a decent pattern. One thing that sucks is that it won't hold shells in the tube magazine. This means it's a really complicated to load single shot. Anyone have a good photo of how the tube holds in the shells?

Seems like it would work just like any normal pump shotty.

Here's a thread I found about the Model 10, there are some interesting comments. http://www.thehighroad.org/archive/i...p/t-32743.html
I couldn't find any good pics of the cartridge stop.

Thanks for the help.