Looks really good so far. The only thing I'd recommend is using a constant torque style clamp on the silicone hoses. Something like this:
https://www.amazon.com/Breeze-CT900L.../dp/B00OL23E24
The spring built into the clamp allows it to adjust to compression set and expand/contract with temp changes. It seems to be less of an issue with rubber hoses but it's not a bad idea there either, especially if you're deep into the VOD and don't want to have to worry about leaks later on.