RGP:
1) I believe R Moshe is meikil but others are machmir (I just saw that R Moshe Sternbuch is machmir.
2) That’s a good point, I was thinking about the egg itself, the pot would need 60.
3) It’s all a minhag anyhow, I suppose the minhag was not to that it any worse than a safek, and safek d’rabbonon l’kula.