Dropping grey water tank in 5th wheel

I was backfilling the black tank on my Carriage and got distracted and overfilled it and it leaked when right full from then on. I dropped the tank and found the top of the tank was thinner material than the rest and was glued on top. The water pressure had pushed the top up and I had a crack about 12" long. I got some black 2 part epoxy and sealed it up and after testing it on the ground put it back up. All connections were fine and I just had to cut the inlet and vent in the storage area and then couple them again when I put the tank back up. Took about 8 hours not counting drying time for epoxy with two people needed for about an hour when dropping and lifting. Mine was fully enclosed and insulated so lots of screws.
Brian