I hovered and flew a Blade Chroma several feet inside this bridge a couple of months ago. But I'm wanting to do it with my new ph4. This bridge is prob at least 300 ft long and looks really cool on the inside too. I am a longtime RC flyer and this will be no prob at all from a flying skill standpoint. But I'm just wondering if I should turn off collision avoidance for this? Would like it to hold altitude steady while moving forward too if possible. Any help of flight settings much appreciated.