I'm having difficulties implementing changes or modifications in my existing 3D design projects in TinkerCAD. Whether it's minor adjustments or comprehensive revisions, the process seems more complicated than expected and I'm encountering various challenges. This issue prevents me from improving and perfecting my 3D designs and therefore has a significant impact on the quality of my work. It also negatively affects my efficiency and productivity in 3D modeling. Overall, this issue hinders my ability to take full advantage of TinkerCAD and create the best possible 3D designs.

TinkerCAD can help you overcome these difficulties by offering a range of powerful yet easy-to-use tools. The software has an intuitive interface that allows users to open their existing projects and make modifications without disrupting the workflow. With the "edit model" feature, you can make changes and see immediate impact on your overall model. Furthermore, TinkerCAD has the advantage of saving all changes in real time, so no progress is lost. In addition, the detailed online help assists you in understanding and mastering the process of modifying and improving designs. This ensures your productivity and efficiency in 3D modeling. Thus, with TinkerCAD, you can fully exploit the potential of 3D modeling and create high-quality designs.