According to the video, the factory may not remove the film from the controller heat seal on the T4 pro. So it is advisable to check this point. Indirectly the presence of the film can be determined by the relatively high temperature of the controller relative to the street temperature without special load.
In my case the film was removed. But on another newer Prokka, the film was also present. So it's better to disassemble and check this point to reassure yourself.

























