I would stay away from anything that is supposed to be automated. I know these repairs would not always looks as good as they could. I know from my experience 3/4 of my repairs require some outside flexing and even sometimes I flex the inside of the shield. Not just the price would keep me from buying its just flash and flare overkill in my opinion, plus I already have a crunchy shoulder
Brent is corrent about the closed system, if there is any opening in a small crack or joining pit,, you will never get a good vacuum. perfect bullseyes are a rare thing in michigan