Another thing, if you're doing more than one tank in a row, keep the developer and blix bottles in a bucket of 45C water or so to keep it at 40C until you use the next tank. If I could figure out how to load 2 120 films on a single 120/220 reel I wouldn't have to do this but as it is I often have 3-4 120 rolls to do and with only 1L of solution I need to do 2 batches. I need to practice with film and tape in the light to see how to do it, I can't seem to get the second roll to stop sticking when it's been taped...

I suppose if I got a 2L solution or bought some one shot Kodak Flexicolor kit bottles then I could get a bigger Paterson Super System 4 tank and do 4-5 120 rolls at once in their biggest model.