Disklavier

Hi everyone,
I'm new to this group and am the proud owner of a disk -w a wagon. As 
far as 720 dd disk go a friend told me that if you cover the right 
side hole on a hd floppy (opposite of the write protect hole)it 
effectivly becomes a 720 dd. I've tried it and it works! I can format 
on my disklavier or my pc. good luck Peter