After looking into obtaining fina, i've decided to become the mad scientist and make my own. My question is this- I plan on ordering 2 carts so that means i'll need a 4g kit right?

One more thing, since i have no experience with fina i don't know how to stack it in my cycle. My next cycle will include prop, eq, and enathate, and fina. Please inform me when to run the fina. Thanks.