Do the attached scans make sense. using a 1620 I burned the same program
My belief before scanning was that for a 8X DVD burning at 4x would probably be best ( not pushing it flat out).
The scans seem to show:
(1) that 8x is best
(2) 4x is next best
(3) 2.4x is the worst.
all 3 play without problem in my Liteon 5005 but I was surprised to see how relatively bad the 2.4 x burn was