Make hard lines for it then if the soft lines are an issue for you. If you want the filter, there are many ways to get what you want with out the risk of catastrophic failure. Or take your friends advise and dont do it. What ever you choose is ultimately the right decision for you. We are only giving you options to think about. And like my outlook on choices I make when at a crossroad, I like to hear other opinions. And that's what you got from people, who also besides your mechanic friend, learned from experience.
