Finally received my Autometer fuel pressure guage. Only thing is, it does not come with the line from the fuel pump to the isolator. It will take Autometer about 3 weeks to send me the braided hose. Can I use the grease gun extension hose method or what would be my other option. And how long of a hose do I need I have seen post where others have used 18" to 3 feet. Does the grease gun have correct size fittings?