RV Repair: Accidentally drilled 2, grey water tank, diameter hole

Question
QUESTION: During installation of vacuum system I drilled a 2" diameter hole through the top and bottom of the grey water holding tank. This is a 1997 35' coachman and the tank appears difficult to remove. I would like to repair it in place repairing the bottom hole(I can get direct access to this hole via the lower storage cabinet that my vacuum system is installed into) with EternalBond tape and possibly fiberglass cloth. The top hole is the tuff one 1. I could take out the in coach storage cabinet out, cut a hole in the floor and get access to the hole and repair the same way or 2. Cut a larger hole in the bottom of the tank and repair from the inside the hole with tape and fiberglass. I could then fill the hole from above with epoxy and insulation.
Complicated problem but what do you think?

ANSWER: Gonna have to pull the tank and get a new one there is no good fix for this over the las t 17 years we have tried it all about the only thing you can do is plastic weld it if someone is good at it. I hate to say it but in the long run you will be better off



thanks

---------- FOLLOW-UP ----------

QUESTION: Any idea where I can get information on how to pull the grey water tank?

I greatly appreciate your quick and expert advice.

Answer
The info part is tough there is not a database like cars its usually just trial by fire. You will have to start at the vale and then the under belly take it apart the n you should be able to dropp the tank then you have to unhook the vent and drain line. This is not a fun process and its usually an pretty expensive fix