The back end however is another thing. It's well known the back end is like an open cardboard box. I attacked 2 different issues with mine.
First is the wheel well flex. If you see how the wheel wells attach, it sets up for the wheel wells to flex back and forth weakening where the wheel wells mount to the frame. I am making my own ladder bar, reinforced the attach area with plate. I have another attach point to make but I also doubled up the original attach point. It had a slot but I brought it down to a hole:
There will be two bars across but the bars need to be tied together. If not the whole unit can hinge so to speak.
The second thing is the opening in the back acts like an open card board box. I build a roll bar and tie it into the roof and the well. Idealistically there should be a cross bar. It's just not realistic or overly necessary once gone this far.
Gary