An improved 3D printer includes an airflow enabled print bed ensuring secure placement of a print base prior to printing. The modular assembly technique provides for improved ease of manufacture and assembly, as well as adjustments of print sizing. The improved printhead includes a heat sink disposed internally therein for improved heat and cooling properties. The printhead itself includes z-axis position detection techniques. The inclusion of VSU insertion techniques in software modeling and printing further improves the print operations by including vertical stability for the print object.