Just a quick follow up for anyone in the same situation, it would seem with the 011-XL vertical bracket on the pcie 3.0 riser there is tiny rubber washers on the bottom to raise it up slighty but in my case it was not raised enough. So the GPU would not sit flush in the pcie riser causing it to be slighty tilted down (the gpu would also not fit at all if i moved the pcie riser to any other location over default). I ordered a pcie 4.0 from lian-li and did notice the riser had slits for the screws so it could be adjusted which i believe was to fix the gpu's not fitting in other locations, i still had the same issue with the pcie riser being to low to fit the gpu properly so i took the rubber washers off the old pcie 3.0 riser and put them on top of to old washers. Worked a treat and now the gpu fits perfectly with no tilt/sag.