I noticed in the routing pic the hose was up against some metal when it went through the hole. It might be a good place to place a protective cover over the hose. Usually I take either the same diameter or one size larger hose section, split it lengthwise and just place it over the hose I'm protecting. A couple of zip ties will hold it in place. Also, the black zip ties I use have some sort of ozone resistance to them and are touted as being better than the white ones when used in automotive applications. If you ask me where I got the zip ties from I'm going to plead oldtimers disease!
Steve
Steve