From my discussions with them they advised that the head (top cap+ flippable plate) come as a set so if any issues they'd happily replace them both hassle free and most probably let you keep the faulty one as they did with my damaged one...?
Agree that since the blade aligns and tab is very minimal it shouldn't affect the quality of shave one bit as both sides offer a close, smooth shave that's efficient mild or aggressive side, making it a great Daily Shaver! Looking forward to your thoughts as you test it with different blades