If your plane is chattering, it's probably not the plane

Before you buy a new one, check these in order:
- Sharpen. Properly. Further than you think.
- Flatten the back of the iron. Just the first inch or so.
- Set the chipbreaker close to the edge.
- Take less. You're probably taking too thick a cut.
Only after that should you start to suspect the tool.
Photo: fireskystudios.com asthetik, CC0. Source
@sam_whitlock · Steady contributor
Step 1 has been the answer to basically every problem I've ever asked you about.