Personally, I think that the CDSpeed test is of much more value to you then the K-Probe test was. The CDSpeed test has shown you 2 things:
#1: That the disc can be read from start to finish, even at a high speed (On *YOUR* drive)
#2: Your drive has a bit of a problem with one section of the disc at high speed, but this is non-fatal, and overall reading speed stays constant.
Now, you did learn a little from the K-Probe scan, but I don't think it does you any good.
#1: Your friend's LiteON LDW-411s see the disc as not having any significant problems
Unfortunatly, since that is your friend's drive, and not your own, you should be a LOT more concerned with how your drive reads the disc... unless you only use your burned DVDRs at your friend's place
. I have seen situations where a LiteON drive (specifically a LiteON 832s) was able to read a disc, and gave test scan about as good as yours.... but in the PX-712a and BenQ DW1620 it was completely horrible... in fact, the PX-712a couldn't even begin to do a transfer rate test, because it errored out before it could even start! The LiteON 832s however can read the disc from start to finish at speeds of up to 8x with no dips or glitches.... but this doesn't help a person if all they have is a BenQ DW1620 or PX-712a
Just something to think about