You are probably right about the weight. My guess is that the graded hammer action keys with wood from the CP4 would add more weight, and as you menti...

Yes, but they feel more "responsive" on the CP4. I don't know what word I'm looking for to describe it. On the CP4 a key goes faster from pressed to...

Sorry for not being more clear in my description. I'm comparing the Montage 8 to the CP4 Stage, which I hold as the the crown jewel when it comes to k...