The Hop Rocket serves two purposes. (1) Hop back. (2) Randall. A Randall is placed between the serving keg and tap. Every time you draw a beer, it runs through the hops in the Randall. Used as a Randall, the first couple of draws are loaded with aroma, then, the aroma diminishes a little as the beer is drawn off. Beer in a keg is usually clearer, the hops will have less to overcome. The Hop Rocket comes with two different screens.....I use the Hop Rocket as a hop back to keep goop from blocking the plate chiller. The 4 oz. of leaf hops I use (mostly low A/A Hallertau) add very little in the way of aroma. Partly, due, to running 15-18 gal. of hot wort through the hops in 8 minutes. I don't consider the hops anything more than a filter medium. In breweries, the brewer will circulate the beer through a hop back for a period of time, to get as much as possible out of the hops. In home brewing we rip the wort or beer through it once.... This may go against the grain (no pun intended), but, computer geek, generated recipes, that many brewers follow to the tee, come from numbers that came out of a lab. The lab came up with the numbers by using the freshest of ingredients. When we get ingredients, they may not be the freshest, then we follow the geeks recipe. There's not a "used best by date" on a bag of hops from Hop Union. We may get hops that have lost some of their qualities. Pellets are a little more stable than leaf. If you're running 5 or 6 gal. of wort. What I'd do, is run the hot wort through 4 oz. of hops in the hop back. If you don't get the aroma you're looking for in the finished beer. Then, hook up the Hop Rocket to the keg, using it as a Randall. It's like other things in homebrewing, it may take a little experimenting and tweaking....Youtube Hop Rocket, Blichmann shows how to use it.