Video: May One Use a Frozen Esrog for the Daled Minim?

When I was a kid I once froze an esrog in a glass peanut butter jar. I used a freezer that was ket at about -18 Fahrenheit and sealed the jars cover shut with silly putty. The next Sukkos, the esrog looked pretty good, but it quickly deteriorated and got dark and soft within a few days, as Rabbi Wilhelm described. Since then I found out that this is typical of fruit and vegetables that are frozen and Lewis Birdseye invented a process that fixes this problem. Birdseye theorized that ice needles which form during freezing pierce the fruit’s cellular walls, which causes spoilage. By flash-freezing (instantly freezing) fruits in a super-cold environment, such as liquid nitrogen, those ice needles wouldn’t form and the fruit would remain firm and fresh when defrosted. Based on this knowledge, it seems to me that flash-freezing an esrog would allow it to be defrosted and it wouldn’t deteriorate quickly, in whicj case Rav Moshe zt”l would probably have been matir its use with a brocha. Any thoughts / agreements / disagreements?