I've never customized my own transdermal (too lazy) but someone correct me if I'm wrong, if you want 500mgs per serving, then you would need 15 grams of 1-Test in the bottle (at least that's what I'm getting from the math) and if that's the case PJ you would just have to increase the sprays per serving, because you won't be able to put that much 1-Test and 4-AD in one bottle.