Early BLPR models from 2017 had a cap over the main gear that didn't have a screw in the middle which is used to refill the vaseline in the engine.
This was intended as the vaseline was planned and tested to be changed once every few months (basically at our service points).
After the intensive testing this BLPR type was quickly changed and so newer BLPR caps have the screw in the middle as all the other models before and after have.

✔ = This product is used in this model.
! = This product can be used in this model, please read the note below table.
- = This model was not manufactured and available.
N = This product is not used in this model.