[Bob Kontak]

My box is mounted to plywood but on the vibration buffers in pic above. If I remember there is a piece of steel that is welded to the floor but flexible - like a tab but wide enough to get two bolts in it. Keeps it away from water and the whole unit can flex up and down a little.

lorenfb - can you talk a little more about point #3. I don't understand it but would like to correct any issues if I have them/