You shouldn't need it. That is just a band-aid. A rebuilt master would be about the same money and easier to install. If bleeding is the problem power bleeding should do the trick. Here is a start to a wiki article on how I made my $20 power bleeder. I'll finish it up as I get more time. Back out to work on my trucks...
http://crankshaftcoalition.com/wiki/..._Brake_Bleeder