Since you're feeding it with a rotor, you might not need it. Give it a go with some paint and see if you have a problem chopping at high speeds, if so then get the lvl 10.
Don't know of any hardline setups. If anyone has one it is probably a custom job. I use macroline on mine, just cause its cheap, easily replaceable, and looks clean. Also is easy to take off. Never gave me a problem.