Once I was dressed and before I put on the blazer for concealment, I went through some draw reps to ensure that I had a smooth draw and to embed the new carry position in my mind so that if the need arose, I would know to draw from that position instead of my normal carry position. After those reps, I put on the blazer and added my Nite Ize S-Biner to the strong-side front pocket to give the jacket more weight to be thrown back then went through another round of reps working on flicking the blazer back prior to the draw.
One of the problems I had with this position was not have easy access to firearm while driving because of the blazer and the seatbelt. Another thing to watch out for when wearing blazers is the side vents when sitting or reaching into pockets. On several occasions I found myself having to lift the blazer back over the magazine carrier while sitting because the magazines had become exposed. This problem can probably be fixed by a tailor, but depending on the style you are going for, the length of the jacket might always be short.
Another thing to be conscious of is the taper of the blazer when buttoning. While this is not as big of an issue unless you are going to be standing in front of people staring at you, no one will probably even think twice about the slight bulges or imprints at your sides.
The blazer and slacks is a great dapper look and a great way to conceal. Send me your takes on this look via Email, Twitter, or tag me in a picture on Instagram (Be sure to also tag your photos with #dapperccw and #dapperconcealedcarry).