I have a leaking tank and want to replace it,I have the floor up and top brackets off,but there must be more brackets on the bottom side some where.I still can,nt lift the tank out. How do I get at them,or should I just cut it out.I would like to keep it in one peice so I can get the correct dim. for a replacement tank. Frist time here and I think it is a great site,lots of very good stuff.thanks for any infro.