I normally mix my own La Tabbacceria concentrates, but a friend sent me 6 x 10ml bottles of Black Note but it is only 12mg nic strength , and I'm used to mixing 20mg nic strength, could anyone help me make a 12mg liquid into 20mg please? I'd probably put the 6 x 10ml bottles together into a 100ml bottle and I would be using hybrid 72mg nicotine, thank you