I'm curious what brand AFCI's were used? I have used Square D, Cutler Hammer and Siemens. 99% of the AFCI tripping complaints I have received over the years have been from Square D. I have actually been avoiding Square D for the last couple of years because of the tripping complaints and also the physical size of the breakers. I have been using almost exclusively Siemens since late last year and haven't had 1 complaint. I was at a home recently we wired and there were 3 finish carpenters doing pick up work. Each one had a compressor and chop saw. I asked how often they had to reset the breakers and they replied not at all. I know with Square D every AFCI in the house would be tripped and all the tools would be plugged in to the bathroom or kitchen receptacles.