Hi, I’m about to decide to buy a GS 500 E Built 93 or not. Would you like to know if any “diseases” are known on this machine. Should I pay attention to something special during the visit? e.g. parts that “always” are broken In addition, I’d rather have a machine with a small panel. Is there a panel with a small disk for the GS 500 E??? And if so, what costs would I have? Thank you very much in advance Frank