I bought the universal kit from "A" and used it for 19-nordiol mixed with 4 andro diol. I used a 75% / 25% ratio to see how it would work. I've had great results. I would recommend using the sterile filter. I did not use the sterile filter and ended up with a mild abcess. I used the filter on the final product (using a new sterile vial) and have not had any problems - could be that maybe the final product was not micronized thus causing muscle irritation (don't know)?. No fever no flu like symptoms. The only symptoms I've had is slight insomnia and occasional sore/ache in the nuts. Right now I'm doing around 75mg ED. Great results and strength. I've gone up in weight around 10 pounds and my waist is getting smaller. I've heard that 19-nordiol helps in lean mass and fat lose - don't know but it works for me. Makes me want to eat more as well - can't complain about that. No hairloss (in fact I'm seeing more hair grow), slight acne - besides that it's great. Plan to do another cycle after this one. (I'm sure someone will flame me - but hey it works for me).