Hi yes you have to fit the lens holder on the pro version as there is no thread on the original. It was a but scary as the original is clued in, but it will pull off with a bit of force. Cleaned as much of the old clue off as I dared as it is on the main camera board. Installed the new lens (PTFE tape). Then did the focus tests taking jpg and checking with each adjustment in order to get the sweet spot. At least is I now need to change the lens in the future I will be very easy. Just need to be methodical and work slowly ( hard for me) should have took photos to show people but I was bricking it at the time incase I damaged the unit.