Time enough
If you have a 34, the tank is about 14-15 years old. Yes it would be nice if things lasted forever but...If you can get access to the whole crack without having to tear out the woodwork, it might be nice if you could repair it but I am guessing that any repair will not hold up. If you have to pull apart the woodwork, I would rather do it once and just replace the tank. The aft tank is rectangular but the forward tank is more complex due to the hull curve in that area. Contact Peggy the headmistress. She has a good number of tanks sizes and shapes.