Hi everybody! For Christmas, I received a Paterson (Super System 4) tank. It is the universal one that can develop two reels of 135 at the same time. I filled it to the recommended capacity for two reels (580ml or 20oz). It barely covers the two reels when I opened the funnel lid (I'm doing this dry run with water). I used the spin stick and it removed the air bubbles fine. My question is do you all fill it more than 580ml (20oz) to ensure better coverage? The instructions also mention putting on the soft plastic lid and agitating it via inversion. With the amount of air that is in it, would it cause excessive bubbles and be a nightmare to keep the film covered? Would I be expected to use the spin stick after every agitation? Do most of you (that have this tank) invert for agitation or do you do the "slide-rotate" agitation? <p> Just a few newbie questions. Thanks in advance for your help!