hi mate
i like your video...it's cool
for those who dont know what i am crapping on about have a look at 2:42 of this video and see how the ice forms in the holes
now your video and discussion makes me think that there might be a "fix" for this situation.........you are right about edges and mass at the bottom.....one thing that i am now thinking AMD LN2 pot design needs is this......the base need VERY tall craters/edges about 5cm high and it needs flow so instead of holes or example that F1EE has it would need the opposite.....it would need those old school matrix style grid at least 5cm high with about 20% of them going even higher in height to some 8cm....i would also leave the middle without any...just yank them out of middle...i reckon a mix of gold pot bottom and the one you showed me but both have drawbacks.......the bottom needs to be as wide as it possibly can be so that you can havea hell of a lot of these but there needs to be at least a cm between these matrices imo
the reason to have about 20% of matrices extending past 5cm to 8cm height is because thats where you want the LN2 to be in that level not allowing it to go higher or lower.....just leaving it around there when you need that little more....so the pot cannot be very tall at all for this so you can have a very good view of the base
i hope you understand what i am saying....hehehe...
there are a lot of ppl i would love to live close to damn it....you are one of them....mainly for that swimming pool thought lol j/k