While I am away from my PC for the time being, I still recall an issue that occurs whenever the right-mouse function of the No Collide tool is used. The buoyancy rating of any prop that is made to collide with nothing (except for the world) becomes overridden and instead adopts a rating reminiscent to "extremely bad." Weight also seems to increase dramatically. Affected props that could normally float automatically sink, and any that are welded to normal props drag them down too. If possible, please consider finding a solution to this issue when possible. Thank you kindly.