Like i said all the discs (except the RiDisc) had the data verified and they all work fine in my cheapo Philips DVD player i bought last year.
Would do but aint got any more Verbatim left . . . and as i've blown a load of cash lately i wont be buying any soon i'm afraid unless i can spot them cheap somewhere.
See the 2.4x speed burn by the link on post #1 its near perfect, would expect 4x to be very similar just think 8x was really pushing my luck but other than at the layer change it would have got mid 90's