I don't want to burst your bubble !       but >>>   why hide the Best part of the Tank in a Corner... ? (A$$) end

Maybe...   just maybe !!!   shuffle your design to enable viewers to see your Tank ! (Your Hard Work)  from all sides !    You could make it pass in between or thru elements of your Dio !  you know !

Just trying to Help...  Not trying to put you down !   

I too will go thru a similar situation !   in a few weeks !  But I think I uncovered an OLD Casting Experiment of Mine which will come in Handy !

Take care buddy !