The star of the show is watermelon RF SC. This reminds me of a cool Watermelon drink. One that you can sit back and drink any time. Not overly sweet, not heavy, and not over flavored.

I have vaped on both RTA's and RDA's. You will be happier with a flavor build and not a cloudy'mc'cloud face build.

This recipe was designed around RF SC flavor because the flavor presents at first with a lot of hope but some report has too much rind. Challenge accepted! I also worked to separate the flavors in the mix...which is why i did the following....

Cucumber is here to accent the rind, but sweetens the green note just right.
Dragon Fruit TPA, and dragon fruit in general helps fill the gaps in any watermelon mix.
Strawberry FA is here to help the red note. Keeping it low doesn't add strawberry, but add the color red. Yes, I believe in vaping the idea of a color (not actual food coloring, that is not good).
Marshmallow and Cream Fresh helps sand down the corners are potential harsh notes.

Development notes...
-I tried this mix with Watermelon PUR/INW/MF/LA colorless. None of which worked. Therefore, watermelon cannot be subbed.
-Marshmallow could be swapped by another non-toasted Mallow, but know your flavor strengths. You only want a tinge of mallow...not full Mallow. Same goes for cream...low and low.
-Strawberry could be swapped by Cap Sweet or Ripe Strawberry TPA...but if you asked I would pick Ripe Strawberry TPA.
-Cucumber, yes you could use another. Just keep in mind the FA is true to the natural profile and really helps as an additive. Your mileage will vary when using another cucumber.

Please steep your mix. I prefer 3-4weeks. If you asked for the shortest time frame for everything to settle and do it's thing? 2 weeks.