[Fast.F10]

In my opinion/full transparency:

Each fin is mounted separately. I like the look of the 3 fin over the 2 fin. However, the actual mounting of the middle fin is not the same/as secure as the left/right fins...due to body structure (not much space for mounting and not hitting body structure w/hardware). Left/Right have 2 mounting points and 3M double sided tape to secure them to where the middle fin is only 1 bolt/nylon nut setup w/3M tape. The goal was to make the mounting points as hidden as possible so not to be seen or show signs of clearance holes on the OEM diffuser if ever removed. My 3 fin setup has been in place for a few days now and no signs of any mounting issues. I also created a 1 piece 3D design with all 3 fins...however, that in its self posed its own mounting issues. As well as increased the likely hood of a single failed print job vs printed each fin at a time (of multiples per print job) due to being a 21 hr print job.