We planted two granite posts on a job two weeks ago and the homeowner has decided they are too tall. They want to cut about two feet off of each of them. It is going to be very difficult to dig them up to cut them, so I want to try and cut them in place. The electric wire is obviously already run through the post. What do you think about the success of this plan.... I am planning to use a circular saw with a 7 1/4" diamond blade to cut all the way around the post (they are 7" x 7") and then use a cold chisel to break off the top section and then using a grinder to smooth down the remaining stone. I am concerned about using a larger cutoff saw as I don't want to cut too far and damage the electric line. Does it seem like this way would work without causing damage to the lower part of the granite posts?