The power unit is dying, and has had the mast replaced once already. I have a manual, locking unit I got on Ebay; if that's easy to mount I'll do so. Otherwise I plan to raise the power unit, then unplug the power supply. How do I get to it? I assume that there is a cover in the cargo area... if you would be willing to email me a photo of the cover, with fasteners highlighted, I'd appreciate it. Even better, considering that Winter seems to be here already, in the Northeast: does this thing have its own fuse...?