Hi -- This may be a lame question, and I apologize if it is......but can you use Hi-MD discs in older non-Hi-MD recorders? I used to be an avid recorder (environmental sounds) years ago, but have been away from MD for awhile, and just getting back into it, and need to purchase some discs (cannot afford a new recorder unortunately!). All the affordble discs I've come across are rated "Hi-MD", so I'm just wondering if these will work in my old Sharp 702. Thanks in advance for your input! Best, Nervx