I'm looking to move the water tank manifold to the small box shelf under the oven, just like illustrated and discussed by Bruce Landsberg. https://www.catalina36.org/members/technical/upgrades/plumbing-system-makeover
I have a question regarding the bulkhead he drilled for the fresh water lines.  The bulkhead is located under and forward of the oven.  Is this a structural supporting bulkhead?  Instead of drilling 4 separate holes, I was thinking of drilling 1 - 2 1/4" hole, and putting a 2 1/4" hose (of the same construction but heavier walls as the fresh water lines), and use this large hose for chafe protection.
Any comments, concerns, or recommendations are greatly appreciated.