Unintentional Trimless tank, Should I worry?

[Doo]

Now that you have it off, is there a way that you can clean it up from the old silicon job and silicon it back on so that it seals well

I know sometimes they are way too far gone to do anything with. I found getting them off was the hardest part especially in the spots where the silicon is very solid. You might be able to win win if you have it off and it is still in good shape???