I know about duplicators because i got 4 different ones acard, wytron, copystar and vinpower. I think the vinpower is the best duplicator around as it dose my xbox360 backups at 8 speed and it takes me 15min to burn with it. the good thing is it work well in my xbox360 all i have to do it burn the master with cd clone and thats it i use traxdata DL disc. and i can do 18 speed dvd-r and it takes me 6 min to burn a full 4.3gb. and you dont need to add a harddrive in the duplicator as it has 128mb buffer on the controler.