Latest review from SCDTV conducted in Polish but with English subtitles cover two motors furnished by Gunfire. These are the GFC Tornado F1 High Torque and the Tornado F2 High Speed AEG motors. They are subjected to various configurations such as spring types, batteries, and of course done in cold weather too. You can check this video out if you're looking for a motor to use in an an AEG upgrade.