Hey guys, new user here. I'm just starting to learn to use an Accubend our shop purchased some time ago. Model 410. The issue I'm having is pushing through the material, it keeps getting stuck on a guard before it goes into the clamps to bend. I'm using .063 aluminum, at 3" wide. Tech support hasn't helped me through, wondering if anyone else has had this issue and solved it? Heres a picture of what I'm looking at. https://drive.google.com/file/d/0B_WSxBOG6EnZYWRJdGN2WDZhN04teEw2ci10aUNaNmotRDhB/view?usp=sharing Thanks in advance!