I'm not a plane expert but that probably wasn't the ideal one for that job. Grain direction does play a part. If you were going the other direction on the part that tore out it might (might!) have been ok. It's kind of a feel thing when working with a plane. Try to start in a waste section and if it feels like it's grabbing and the blade is sharp try from a different direction. Also, skewing the plane instead of having it directly in line with the direction you're pushing it can help. Like any other tool, you have to practice and work with it.



