Wiper washer jet? seriously??
Sounds like someone had a bone to pick or something...that must be so frustrating when you've put so much effort in, to be pulled up on stuff like that.
Re the wheel hub adapters - when I got my desert rats reburbed for the ute I asked the guy at the wheel shop about the need for hub adapters since the desert rats had a larger bore dia. than my hub spigots. He said no need, the wheels could be "hub-centric" or "lug-centric" it didn't matter either way. I think something along the lines of not being a 4.5 ton truck so no great danger of the studs being sheared or bent. Seems like it could be one of those things, different answer from everyone you ask