"stop the oil canning."

Thanks. I hadn't thought about it, but that's what it is. Maybe I can make up a bag of Styrofoam peanuts or bubble wrap to "load" the oil can and tamp down the noise.

If you want to copy, it's okay with me, but I have to warn you that your wife may object and it draws a lot of stares.

Added later.
Here is a little photo gallery page:
http://www.ericvey.com/Workhorse/photo_gallery.htm