GX-24/CX-24-CM-24...........are all the same just a different number as to when it was made.....
having owned only PRO type ROLANDS...... the old PNC-1000/1000a or any PNC-xxxx was far superior to the cx/gx/cm-24.
i went to PENN STATE fayette campus. 77-78 had a couple classmates from where you live. wilma napotski.......was one..... we(art prof & i) also taught the people who own this pottery how to throw pottery.
http://www.newgeneva.com