[DaveTM]

Look for frame rust....seaver frame rust. Look underneath the battery holders for any corrosion of the frame that holds the batteries. Also, check around the rear leaf spring connection points for any frame rust through.

I will tell you that my frame cracked all the way through (I use mine for hunting and one day I didn't see this HUGE hole covered by tall grass) and I just had it welded up. That was 3 or 4 years ago. It's been fine.