Thought I would post and share an issue I experienced yesterday with a premium version which I purchased 6 weeks ago. I enjoy reading this forum and thought by sharing this, it may assist others in the future should the same issue arise.
The left flipper on the mini PF, although operating, was very slow when returning to its de-energised state (parking position).
While not happy with this happening with a NIB machine only 6 weeks old, the only way to attack the issue was to remove the mini PF to explore the cause.
I found the mini PF was very easy to remove by the simple unplug of x 3 wire harnesses and x 4 lock nuts (Circled in RED) under the PF. (Diagram Attached).
I removed the coil and found there was some resistance on the flipper linkages which was restricting the spring around the coil plunger from operating efficiently. I disassembled the flipper bat and linkage, cleaned and reassembled all. Fixed !
Still unsure of the cause, however now confident in the future to remove and fix any mini PF issues in the future.