Sadly, I’ve decided to ditch the Honda Rubicon Atv oil tank idea for now... it is coincidentally a great design for a trunk mounted turbo on a w215 car, but it’s aluminum and I do not have the means to weld aluminum right now. Lying around, I had a small air tank for an air compressor system. I cut it down to a more reasonable size, and welded it shut. Later I used a hole saw to cut a 1 1/4” size hole for my 16an drain line to run directly into the oil tank