Report: I made replacement lines for the Honda yesterday. My only complaint with the Mastercool setup is the loose parts are tough to handle. But once you get it all in place, the flaring is quick and easy. I recommend.
I think my trouble in the past has been related to stainless lines. Common flaring tools are totally inadequate for SS in my experience. After working with nice soft steel I think I could have done it with lesser tools but I don't regret buying the Mastercool at about $300. It even formed the "push to connect" fuel line too.