I bought ProtoTech’s 3D PDF Exporter plug-in for Inventor 2 years ago and have loved it ever since. When Inventor came with its own converter built in I considered switching over to that. I convert large models for viewing by my clients. The In-built Inventor converter takes much longer...even with the most simplified settings. The 3DPDF Exporter plug-in from ProtoTech Solutions is way more refined and handles large models with ease. It is easy to use, intuitive and makes smaller output files with great quality. Plus the makers of the program give it exceptional support.