Also unclear how it would crack, I mean if it was air tight, which it should not be it could expand and crack I guess but I never new these to be that tight.
Regardless, you may want to leave out that you left the black tank flush on and the valve closed, just go with the tank cracked and let them figer it out on their own.
As for cost I thought I read a thread where it cost close to 900 for the tank and labour.
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2015 Sandpiper 30IOK
2019 GMC 2500HD 6.6 Duramax
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