Great job on the write-up and diagrams. I wish i knew how to make diagrams like that and type words with arrows over downloaded pics.

What program do you use?

One more thing...based on your pics its hard to tell if those running the Needwings intake will be able to fit the resevior the way you have described without issue. Your SL55 plastic tubes probably flex more. What are your thoughts?

It appears the pn# on the tank should be WE100 not WE1100. Also, im not seeing XRP-993203 on the website. Correct me if im wrong but the only parts you really need to get off the website are WE100 and WPM34U, the rest you can get at the local hardware/autoparts store.