If you get an aluminum you can just cut a hole for the sump and bolt it down to the floor where the plastic tanks use straps and require some sort or shield under the pick-up area. My 16 gal RCI with sender was starting to cave in on top so I got rid of it. Thinking about a 10 gal alum cell with sender now for around $180. Had foam in my RCI but don't know if it made any difference.
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