What I'm hearing is some are making enanthate, and cyp this way. I, however, do not do that. I like to stick with what has worked for me with the ba and bb being added. Btw, these guys are using gso. I like the low viscosity of gso, but I also want more shelf life, so I'm looking at sesame oil (which my rx depo test contains), for my next run. Viscosity isn't my main concern as stability, and shelf life is.
Test E will hold easily at 300mg ml with no BB, Cyp will not. Also Deca holds incredibly well at 300mg ml with just BA.
I am the type that likes to try a ton of different formulas to see how each one reacts or fails or whatever. When I order a 100grams of product I usually figure 5 or 10 grams was to just play, thats how I learned.