Ah OK. Thanks. Good luck/continuation for the next.One of my sources:
Mars-to-Earth-Mass Planet May Lurk in Outer Solar System: Planet 10
According to the calculations, an object with the mass of Mars orbiting roughly 60 AU from the Sun on an orbit tilted by about 8 degrees (to the average plane of the known planets) has sufficient gravitational influence to warp the orbital plane of the distant KBOs within about 10 AU to either side.