CD-Rs wont really damage your system unless you do the following:
1) Buy shitty ones
2) Burn them wrong
The problem is shitty discs aren't very reflecty. Incorrectly burned discs are hard for the system to load.
The end result is it overworks itself trying to focus and load the data. Making it reach the end of its expected lifespan a wholeeee lot faster. This is just made up for examples sake but say the drive expects like, 10 million successful loads with real good discs....
if you give it shitty discs, it overworks itself and will only get 5 million successful loads instead.
If you use nice silverbottomed reflecty discs, or the gold ones....though those are kinda thick, and I think maybe heavier physical discs may do something bad, sort of like how PS2's hate the old, bluebottom discs when they are about to croak. It might wear out the motor or gears or something. Who knows.
Anyway just burn them at 1x w/ silvery bottomed discs, and you have nothing to worry about. I play burned games in my duo-r all the time. They put as much stress on the system as a commercial disc because they are basically a commercial disc without a fancy label.
Silver bottoms, and proper burn speeds ! GO GO GO.
You can get a stack of silver bottomed discs for like, 20$. 100 discs I think.
http://www.emediadepot.com/Diamond_CD_R_True_Silver_s/24.htmThem! Get some!
They work for the PC-FX too. So, go buy a PC-FX !