I was told by way of a hand written note n an invoice that each shot equals 3% .
Someone in a thread posted that they had used 70 FW (MBV) flavors doing DIY and that with most 12.5% flavoring was a match for no extra shots MBV
ejuice. Myexperience has been trhis is a good starting point for many but not all flavors.
I like their Blu Bacco 80/20-18 mg. with 2 flavor shots. When I DIY it using their Blu Bacco concentrate I mix at 25% which in theory would be 4 flavor shots . I do notuse their Pg ,VG or Nic however so there could be a difference there.