I just upgraded my 4x4x24 cdrw to a 24x10x40. I have *boatloads* of cdr's that are rated at 4x. What happens if I try to use these in the new drive? Will they just fail, or will the drive detect that they're slower than optimum and slow down, or what? I'd hate to lose them all but I also don't have any need for coasters.