i had thought doubler was something else ,,
i have a ry4 strong that is has excellent flavor but is just too strong to vape for very long,i need to cut down the flavor so i guess VG base would be my best bet there
as far as sweetner goes it is rather hard to find it,most vendors i have searched don't carry it,,or it is hid very well..LF is my vendor of choice and they don't have it either
please post some more options of vendors that sell Sucralose or Ethyl Maltol