Brian does bring up a point here that might be handy to know if you decide to go this route. I don't know how much liquid you can put in the tank and still have it work without spilling (I've never done a test to find out), but I have put in 500ml before (water in place of stop bath) with no trouble at all. My recollection is that the tank could have taken significantly more liquid if I'd needed to put in more. Keep this in mind if you run into a situation where you might go below the recommendation for the minimum amount of developer needed to process the film area you have in the tank.