FWIW, I ordered this heater last week and it came in a few days. It works great on my Kossel Air and immediately fixed my curling problems for Simpson parts.
It was super easy to install; just had to crimp 4 wires and add housings, apply the sticker-style heater to the boro glass, and enable the thermistor in Marlin. However, a regular-size Kossel Mini may require a few cable extensions. Mine is 500mm tall and the wires just barely reached the electronics at the top.
It was super easy to install; just had to crimp 4 wires and add housings, apply the sticker-style heater to the boro glass, and enable the thermistor in Marlin. However, a regular-size Kossel Mini may require a few cable extensions. Mine is 500mm tall and the wires just barely reached the electronics at the top.