difference between a dice pot and ln2, mass. A pot good for dice has less, a pot better for ln2 has more. Why? It's the temp swing mentioned above, if you have a pot with a ton of mass (like say.. 5+ lbs) that is one piece temp swing becomes much easier to control with a very cold liquid (ln2) but with dry ice you don't have to worry about cold bug generally speaking, so if you had a ton of mass you get too much for the dry ice to cool, let alone keep cold with cpu heating it up. You need less mass because of the conduction of heat.
With dice you also want a lot of easy to access surface area (think of the f1ee extension piece) because the more area the dice has to contact the more ability it has to cool, but it's not as nice an easy to make contact with as ln2. Also since no cold bug you want that thing full of dice the entire time, as much dice as possible. Think of how elaborate patch's base is, it wouldn't work that great with dice because dice isn't gonna flow through that small of holes well, the acetone may, but it's not at the same temp as the dice, slightly warmer. So a good dice pot has a medium amount of mass, a lot of surface area, and lot of area for the dice.
And yeah, my pot is fuggin huge (about 3" diameter), and i had to cut into the insulation to get the pot to mount to 775.
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