I did the same research and yes, it's the one. As you can see from the picture, there is two screws on the left that allow the adjustment of how near of the needle you want the binding tool to arrive. It should be ok for a slant shank. But you could ask the seller directly (bought several notions from him, he is nice).
For me also it was so worth it... I hated to put binding so much that I was always looking for another way to finish many project. Now, I'm putting binding everywhere :-)