Its all good. I probably trust myself to do way more things than I should, but I haven't screwed anything up yet so I must be doing something right.
It really isn't that bad though. I called several places up here in Tulsa, and installation on brick seems to be something that only a couple places would even touch... for liability purposes. And there were disclaimers and crap for them too and nobody had very many installs on brick under their belt because everyone shys away. I figured, if Im going to pay someone alot of money to install something that they tell me they aren't responsible for for the entire time its hanging (alot of weight pulling down on nothing more than stacked brick) and they aren't THAT experienced at doing this exact install.... I might as well do it myself so i know its up there as strong as its going to get. 125lb beauty hanging on my all brick fireplace now.