I have an appointment for my 2017 P100D MX on Tuesday about a strange vibrating noise sometimes when accelerating and regenerative breaking not working even in good conditions. (If anyone has any info on those please link them!) But at the bottom of my requests I asked about the HW3 retrofit. I haven't seen anyone online post about their HW2 (not 2.5) car being upgraded but according to my service center they have done them. But we all know how Tesla service is, so take it with a grain of salt! And yes I have a reminder in my phone to text again in a month!