It is a very good question. I had ten digital pianos since late 2020. Among them five (including this one) with PHA-4 action and I also had Yamaha digital pianos with GHS and GHC actions, FP-90X with PHA50 action and Yamaha P-515 with NWX action (heavy action). I definitely think that RD-08 has the best PHA-4 action I have ever tried (I tested many other actions). It does not have the clicking noise my previous PHA-4 pianos developed and its feel is quite similar to the action of Yamaha C7 grand piano that I regularly play (even though that is a bit heavier). I like RD-08 sounds and its action. Here are some numbers (downweight): Middle C (C4) - ~65g C7 - ~57.5g C6 - ~62g C3 - ~67g C2 - 67g 68g moves all the keys - some (below C2 in particular) with a small push C4# - ~?55g - ~68g (middle of black key) C4 - ~ 86g (T) C7 - 82g (T) C6 - ~86g (T) C2 - 86g (T) C3 - ~89g (T) Michael
@@christophelafont1844 I will be glad if it could help you. I should add that the clicking noise of PHA-4 action has been associated with lubrication problems. I heard (from two different sources) that Roland has changed something in the lubrication process recently.
