Perhaps in time to come, we'll get more adventurous with DIY - I just looked quickly through this - there's two 'books' files (PDF's) that have recipes, clones (Beard #32, #64 & #5 ), percentages for all flavours/concentrates, and lots of info on mixing in general.
Vaping Home Brewers - Coming Soon
I've saved both files - they look as though they'll be useful!
The Beard #5 is really simple!:
New York Cheesecake (CAP) 10%
Sweet Strawberry (CAP) 5%
(As is the #64)
George ...there's a Castle Long recipe too! All TFA, so very small amounts of each.
(The above all in book 1)
Plenty more in book 2.