kayfun 5²

Just ordered a Kayfun 5² from germany yesterday. Been searching around but seems like no1 even knows it exists yet xD its basically a kayfun 5 with upgraded airflow. They have a vid on youtube > To compare> These are the airflow options the k5 has: 1,8mm (Kayfun Lite plus) 2,2mm (Kayfun 4)...