Be aware that inserting an extra slow in your four step (absent an obstruction) is technically a syllabus violation - though you are as likley to get marked down for simply dancing the four step with the wrong timing as penalized for breaking the rules. If you want to stay on phrase, you need to change the timing before you start the four step. In gold, you can use a five step instead. And in open you can use whatever timing or hesitations you think will work best.
It's interesting to note the resemblence between the brush tap and the last action of the American tango basic. While beginners use a drag close on a slow, some will use a brush-tap action in intermediate smooth. In either case note that this is not a closing on a quick, so it doesn't imply a weight change - it's either a drag closed on slow, or a closing towards on & followed by side on slow.