I started tuning my P-25F yesterday and finished (for now at least) this morning. In the process I fiddled with gapping, which might account for an odd result or two. One observation before I report the results: Three fairly large, deeply threaded screws hold the reed chamber cover in place. These screw into the plastic frame of the pianica. If the holes are not lined up perfectly, the screws want to go in at an angle and dig new grooves. There’s some resistance in any case the first few times, but I was very careful to back the screws off and get them into their original grooves. After you do this several times, the screws set properly in their grooves and then are easy to remove and replace.
I am tuning to A=433. I did a lot of rechecking and tried to blow as evenly and moderately as I could. The A443 standard reading is given to the left, followed by the factory tuning and then by the final result for notes that I tuned.