you can't fit a reel down in anything smaller than a 2 gallon tank, if you want to use 4-up hangers or full 8x10 ones. the one gallon tanks are pretty slim--they run about 4 or so 4-up racks, but they're too skinny for a reel. a two gallon tank--you can run about 12-15 rolls of 35mm on s.s. reels or about 9 or so 120, and up to 28 sheets of 4x5 or 7 8x10. I have used a wing lynch as well-- as someone mentioned it uses nitrogen, but not the same way as a tankline. the nitrogen pressurizes the tanks that hold the chemistry and it's that pressure that acts as the pumping mechanism to get the chem into the "trough"--where the tube is. the trough is temp controlled, as are the tanks (24/7). the nitrogen in the tank, as it displaces the chem volume acts as a blanket--chem lasts a couple of weeks in a wing lynch. it's not so great for low volume use though, because it sits there cooking at your process temp. it's not the same thing as a jobo though--they're both tube processors, but the WL is more of a machine really--automated & much larger. probably the best replacement for a jobo would be a super-sidekick...better low volume machine, but I'm not sure if you can do 8x10 in one of those.
