Getting ready to re-carpet my RV. going to use carpet in most areas and hardwood the bath. My question is how do I get the carpet to mold around the doghouse (motor box)?
one piece! you were lucky. You may want to cut that piece into 2 or 4 more managable pieces. Try to keep sections on the same plain. Wrapped side-to-side, or top-down, etc. Trial fitting is slow but pays off. I used floppy shag to hide the inevitable small gaps, because my doghouse is very curvy, not boxed flatter like your Mirada looks to be. Maybe 2 pieces for the lid and 2 more for the base would do yours.