Any way to schedule a custom Cube booster content?

[abellg]

Hello

I would like to know if there is a way to schedule the content of a custom Cube. I've created and make it work my own Cube with the .dck file and .draft file, and seen in other Cube files how the .draft file admits "operators" to manage the rarity of the cards in the booster, but I would like to "balance" the content having 2 cards per color, 2 gold cards, 2 colorless and 2 nonbasic lands. Perhaps if I order the .dck with labels/tags to divide per colors there is a way to refer that in the .draft file?

Also I've seen the !fromSheet("") way in the Editions folder, but I'm afraid it works only for the Quest Mode.

Anyone who can help me? Thanks in advanced!