Few words: I've seen a couple of videos on youtube from people trying to use hot glue guns as hotends. They were all relatively janky and were made out of plywood and random gears laying around. While that is a liable choice for a repstrap printer, I've been thinking of creating a "proper" design for such an extruder in case anyone who is adventurous enough to give this a shot. This is desgined for 7MM glue sticks with some room for error and has to be paired with a stripped down dollar store hot glue gun in order to have a complete hotend. I chose to modify mine by removing the 220V heater and replacing it with a 5Ohm 5W wire wound resistor and 100K thermistor for better temperature control and safety. Alternatively you can use a 30W hotend heating cartridge which was my original intention however I did not have a way to correctly mount it to my glue gun without it being exposed to open air potentially causing damage to it in the long run. The easiest way to go about this would be to use the original 220V heater, however this is NOT RECOMMENDED as it would be HIGHLY DANGEROUS especially for people that do not have experience around high voltages.