Lots to see here. The factory options were to chop a foot off the height of the trailer (4'11" inside height!), add two 6' sections of E-Track on both walls, windows, insulation ceiling, walls and floor, 12V (overhead dome lights, porch lights on both sides, wall sockets and vent rough in for fan) and AC feeds (inside and outside jacks and a florescent light over the street-side window), white vinyl ceiling liner, four D-rings, stab jacks and tongue-mount spare tire.