If you want to prevent chafing, it's generally good to cover the lines with electrical heat shrink tubing. You'll have to pull the lines to do it, but it really helps. Epoxy these where you can and tie to them to keep the lines from moving. https://www.newark.com/thomas-betts/tc-105/cable-tie-mtg-base-aluminum-25/dp/12C2341 There are rivet on options as well.
I'll add that to the future projects list. I wrapped all the contact points so it should be fine for now.
I'll need to take the front off again for ducting but I want to see how it all performs as-is.
