Riders often have boilerplate language, and are supplied by management.
Call and advance it.
Has anyone seen a rider listing a PM3K as acceptable lately?
Indeed, many agents and management companies just "cut and paste" whole blocks of text from the rider for their most successful act (either current or in the past) and put it in ALL of their contract riders.
Yes, CALL and advance it. When you talk to the person(s) who will actually be doing the show you often get a clear, realistic perspective. Sometimes not though, if the artist is an "on the way up or on the way down" delusional "superstar"
I have, in the last six months, seen one, and only one, rider that listed a Yamaha PM3K as acceptable.