I have worked in smash repairs for 15 years as a painter, I would have zero problems taking the plastic cross section out on an fg, and I have spoken to a lot of top panel beaters about this, but the problem with removing the whole reo on your car like you have, is that if you get a hit from the front side on, the rails will not be braced together, even removing it like you have, your weakining that side front on support, in a case of a decent hit, the rails won't move across together, you will probably just buckle the bar reo in the middle. Cars have that brace between the rails for a reason.