I have used a MityVac brake-bleeder-Vacuum tester on all my brake lines for years. I have the Metal ( More expensive...rebuildable...great quality ) one ...but the Plastic one works well too. I put stainless lines on my Raptor as well...and after bleeding with the MityVac there is NO lever mushyness whatsoever.
http://www.casporttouring.com/store/...y_Code=Mityvac I just did a quick search and found the plastic one cheap for 27 bucks...you can use it for engine diagnosing as well...a great tool