45-degree rule: In the general model, over 45 degrees of prominent parts need to be supported during printing. Therefore, when modeling, try to avoid highlighting the larger angle.
The optimization design adds less support: the pain of adding support and supporting support is only known through personal experience. After the support is completed, it will still leave an ugly mark on the model. The process of removing the marks is also time-consuming and laborious. In fact, you don't need to add support. When you look at the modeling, you don't have much effort. You can design supports or links for the parts that must stand out to reduce the chance of adding support.