Assemblies Video: What's New in SOLIDWORKS 2021 - Assembly Productivity Tools Contents Saving a Defeatured Model as a Configuration When you use the Silhouette method for defeaturing, you can create a configuration from a defeatured assembly. In the assembly, you can switch between the defeatured configuration and the full model. Performance Evaluation Checks for Circular References Performance Evaluation detects circular references in assemblies. Spacing Options for Chain Patterns You can define spacing between chain pattern instances as a measure along a path for Distance and Distance Linkage chain patterns. Auto-Resolving Lightweight Components For assemblies opened in lightweight mode, top-level components and subassemblies resolve automatically when you click to expand the item in the FeatureManager® design tree. Components in subassemblies remain in lightweight mode until you expand them. Exporting Interference Detection Results You can export results for interference detection in assemblies to a Microsoft® Excel® spreadsheet. Slot Mates You can specify a default constraint type and lock the rotation for slot mates. Synchronizing a Patterned Component to a Seed You can use Synchronize configuration of patterned components to seed to block changes to the configuration of patterned instances. Mate Alignment When you flip the alignment of a mate, the edited mate flips. Assemblies Performance Improvements Mate PropertyManager In the Mate PropertyManager, the standard, mechanical, and advanced mate types moved into separate tabs.