Logan does have a tendency to switch off every now and again, which can be costly. I don't think he's ever had much competition for his place in the starting line up. Gallagher seems to be versatile and has played RB previously. Once we get a couple of midfielders in, perhaps McInnes will use him there, which would keep Logan on his toes. The thought of Gallagher bombing up the right and Leigh bombing up the left does sound good. Although perhaps Gallagher will be used elsewhere to maximise the effects of his pace and energy.