The BTB is a bit diffrent in NTSC then in PAL.
I only have DVE disc for PAL, but if someone wants to send me the NTSC version, i wouldnt say no
If the players settings are set to default, you will only see one of the BTB levels, I think it is the +4% level, To get the +2% level to show up you need to set GAMMA to -1.
Then to get the -4% you need tp tweak the Brightness to +2 and contrast to -2 or there about!
Also when you change the BTB you need to restart the player so the changes can take effect.
yes it should play DVD+R Dl without any problem