Ok the first question you answered yourself is wrong. It is not 50ml's, but 100ml's.
5 carts along with Dazed's 5 cart kit will yeild 100ml's at 100mg/ml.
5carts=10 grams of test.
On the rinsing step....i would rinse at least a gallon of water through it. The rinsing is what removes the estradiol, so the more you rinse it, the better. If you don't rinse it enough, you are leaving some estradiol in there.
On the drying step.....you must have it completely dry before adding it to the oil/solvent......otherwise it turns out cloudy because of the moisture.
A lot of guys will put it in the oven at a low temp to speed up drying...........I advise against this. I have read at least 20 posts, where the guy puts it in the oven, and his oven is hotter than he thinks, and his powder melts all over, and is lost. Just be patient, and let it air dry.....it only takes a couple days. Break up the clumps, as it dries.
Just take your time, and don't rush anything, and you will end up with a good final product.