OK, so I think you want to remove or relocate that slim glass brace in back.
I personally would try to alter or mod the HO gear before correcting the tank, I'm sure it ties the other bracing together and I don't think you are going to achieve that by turning it flat or sideways the way you are thinking.
That is a unigue and interesting design.
I think only the manufacturer or whoever designed it can give you a true answer, or a specialized glass builder.
I can tell you those spray bars often clog, not sure I'd stick w/ that plan unless you have a way of getting to it to clean or replace it easily.