From: "Harry K" 
Newsgroups: misc.consumers.house
Subject: Re: Concrete cutting with Circular Saw?
Date: 14 Dec 2004 19:52:12 -0800
   posting-account=3X3iVQwAAAA5qeF0JLSgIGYnZgL6amWt

I would go for a roto-hammer with drill bits and chisels.  A diamond
saw makes one H.... of a mess and the noise is nothing to sneeze at.
Your idea to use your own and a masonry blade is a non-starter.  You
will be throwing it away before the job is half done and I doubt if you
can saw a 4" slab with it to begin with.

Harry K