I found a recipe on here awhile ago, but after trying it, I thought it didn't really do the original juice justice. After experimenting a bit, I've come up with something I really like.
All TFA flavors:
*5% Green Apple
*4% Raspberry Sweet
*3% Lemon
*2.5% Sweetener
*2.5% Sour

I'm still honestly kind of in the air on whether or not the Sweetener and Sour should be 2% instead of 2.5%, however, I like this turtle piss to taste like a candy, so I personally appreciate the higher sweet and sour accents.