It looks like the original poster has left. Could you, (J Woods) post the new rule idea? Thanks
As I remember it, it was simply to allow a win also by getting 4 Gobblets in a stack also. If you claim a win by this method, and you are found wrong - (by exposing the 3 covered Gobblets) - you lose!
The OP said that this should almost never happen, as everyone would know what was hidden underneath. But I'm not so sure...