Support removal

1. Supports: Tree Vs. Linear in 3D Printing (Compared)
2. 3D Printing: Dual Extrusion Vs. Multi-Material (Defined)
3. 3D Printing: Draft Vs. Quality Mode (Clarified)
4. 3D Printing: Shell Vs. Infill Density (Defined)
5. Resin Vs. Filament: 3D Printing Career Focus (Compared)