Precision iBar & Suprastructure Design | From Your Bridge STL. Convert your finalized bridge design into a high-performance, dual-structure framework. I provide professional CAD services to generate a stress-free iBar and a perfectly fitting Suprastructure, both delivered as production-ready STL files. Workflow & Technical Specs: Input: Send me your final Bridge/Wax-up STL. Output: 1. IBar Framework: Optimized for maximum stability . 2. Suprastructure: Precision-fit shell .