Furrion Chill Cube Duct for Monaco center duct motor homes

I designed this duct to adapt Furrion Chill Cube roof top AC units in my 2005 Safari Panther ( Monaco made).  The design applies to  center duct motor homes with a duct width of 8" centered in the AC opening.  Each side is approximately 200 x 135mm. The height offset is 58mm and the side offset is 50mm.  I am including the fusion design file if you need other dimensions.  Roof thickness can effect required dimensions.  

  I used ABS but ASA should be fine.  Print flat with tree supports.