Manual Solder Paste Dispenser Assembly

This video shows the assembly of a simple manual solder paste dispenser that I designed around a 1-mL syringe with a luer lock tip. My design was inspired by the "Spoty precision SMD micro-dot solder paste dispenser" (https://www.avdweb.nl/tech-tips/pcb/solder-paste-dispenser). The design files for the 3-D printed body are located at https://www.thingiverse.com/thing:5432693 and also at https://github.com/bminch/Eclectronics. Parts required in addition to the 3-D printed body: • compression spring, 0.75" long, 0.25" OD, 0.198" ID, McMaster 9657K285 (https://www.mcmaster.com/catalog/128/1417/) • low-profile nylon thumb screw, 8-32 thread size, 0.75" long, McMaster 94955A030 (https://www.mcmaster.com/94955A030/) • 8-32 brass threaded inserts, 0.251" OD, 0.185" long (https://www.amazon.com/gp/product/B07NBHC7VT) • #8 steel flat washer, 0.375" OD (https://www.amazon.com/Hillman-Group-280052-Number-8-100-Pack/dp/B000BQO22K) • 1-mL syringe with luer lock tip (https://www.amazon.com/gp/product/B071GZP1QP) • silicone dishwasher prong rack caps (https://www.amazon.com/gp/product/B0746FBSBN) • 22-gauge luer lock blunt end plastic tapered dispensing needles (https://www.amazon.com/gp/product/B07GLJZWL8) • 27-gauge luer lock blunt end plastic tapered dispensing needles (https://www.amazon.com/gp/product/B07JR5JYT2)