Jim,
The interior of the cap includes cabinetry. I had Windoors installed in the Leer Cap for ease of access to load and unload. The Cap lifts 17 inches for head room. The lift is from Topper EZlift. Once lifted, tent canvas with windows and screens is deployed. I did not like the flip tops. The middle floor panel slide out and rests on runners on the cabinets to make a bed. I have the pictures attached (I hope). Other people have done the same thing but the cabinet design is my configuration. I have an aux battery and the cap is wired for lighting and USB connections.
Paul,
The bumper is Fabfour Bumpers. It is of good construction and weight. I do not have the sensors but the bumper can accommodate them.