Q Question

Clark Propst

I started assembling a CB&Q single sheathed double steel door box car XM 11? Instructions show door and a half cars and those with steel double doors. The double door cars have raised roofs. My model has the correct side bracing for the double steel doors, but not the roof extensions. Is there a version with steel double doors without the raised roof? Or do I need to fabricate my own extension?
CW Propst