So where did you get it? I have one just like it, but no extra dies. Mine just uses the red/blue/yellow. It was a HF special, but I like it alot. I can see the need for other dies. I have not heard of the ability to adjust tension, so I will learn something new too.
My friend had model 18920 which has 5 dies. I looked for the same 18920 on eBay and found that they sell the 18960 which has 7 dies for only a few dollars more.
Here are a few pics of the adjustment wheel.
Wheel location [size:11pt]Close up of adjustment wheel.[/size] 
