To be truly honest......
I would just buy 1 x 10ml bottle of 50/50 nic shot
then add 2ml of flavouring if also at 50/50
(if flavour is PG then add 2ml pg flavour, 2ml of your vg nic = 4ml 50/50 & then 8ml of 50/50 nic)
*** typo said 2ml of your pg nic when I meant 2ml of YOUR usual vg nic shot to keep it 50/50 ***
anyway 10ml nic + 2ml flavour = 12ml juice @ about 16.666%
the nic level will be a smidge over 1.4mg, say 15mg if using 18mg nic
or a smidge under say 12.5mg if using 15mg nic shot
if you use one nic shot 10ml & add 2ml flavouring
(or 2ml flavour pg then 2ml vg nic topped up with 8ml 50/50 nic)
tbh the bit either way on vg/pg level, the bit either side of 14mg if using 15 or 18mg nic
is not going to matter a great deal as a first test batch
& 2ml flavour = 16.66666666% of 12ml total
I mean you can do the maths n shit but it won't be really far off
plus it keeps the initial batch simple, uses just one nic shot & just 2ml of flavour for testing
if that is almost acceptable you can tweak the next batch of 10ml
(heck even mix first batch & second batch & sample it, to arrive at a possible 3x the charm on next batch)
by the third batch you are nigh on there perhaps and still have 14ml of flavouring left to use
(to make up say 100ml of final batch once you got it all sorted)
That is what I'd do for first batch, 10ml 50/50 & 2ml flavour for an initial first tester bottle
(all you need is say a small syringe say 5ml capacity, draw out 2ml flavour & add to nic)
As usual I tried to simplify it a bit but upon explaining it I made way more complex
yeah 10ml + 2ml flavour is @ 16.6666%, there abouts or a tiny whisker just under 2ml syringe
