Prevention is always easier than repair. By adopting a few smart modeling habits, you can dramatically reduce the frequency of top cracks.
Developed by Fredo6 as a more advanced tool, FredoCorner is widely regarded as a major upgrade. It is the superior choice for complex geometry, especially where multiple edges meet at a single vertex. sketchup round corner crack top
Fredo6 developed FredoCorner as a paid evolution of the tool. It is based on a different, more robust algorithm that handles complex triangulated shapes much better. Prevention is always easier than repair