i tried before, not so many times, but since i brew my own steroids, i prefer take each component and mix them in the same syringe. At the end is the same. When you brew them, you have to be careful using the neccesary BB and the correct amounts to get the oil stable and don't crash. Also blends sometimes can be painfull. For my experience if the oils are well done i prefer to inject 1ml of test e300 and 1 ml of deca200 in the same syringe, than 1 ml of a blend test300+deca200. Your ass always can handle between 5-6ml at the same time without any problem and if the oils are painfull, you shouldn't have a problem