Why don't you try an LR on a usb passthrough before paying for a mod? I have read on several forums that for higher voltage you need higher resistance. Basically the LR atty heats the liquid too much on a higher voltage. Heating the liquid too much just burns it, and some people might think it's got a better TH. Also there's a thread here you can search, and they discuss the fact that heating up VG above 280 C produces very toxic materials.