@David B , i can honestly say that after an hour or so of investigating spread over 2 days, the best answer i have for what kind of piano ? is, a shiny black one. There are not even enough clues for me to determine if this is AP or DP / hybrid. I tried poking around Jason Halbert’s info but no luck.
Two nights before you posted this, i was considering authoring a thread “ iD this piano” , carrying on in the spirit of 4/1/22, and b3ginning with the following riddle which includes more, better clues visual and aural, but ?
PS. Just given the history clue coupled to the scale/size & sound clues, my guess is that Rick is sitting at some sort of (2013-era) Yamaha hybrid….. or possibly a premature tiny baby GP.