I also have a UHK and a Magic Trackpad and just keep it between the halves. It enforces proper separation, since without it I tend to default to keeping the hal

I also have a UHK and a Magic Trackpad and just keep it between the halves. It enforces proper separation, since without it I tend to default to keeping the halves too close together, and while the modules partially overlap the corners, there's still more than enough usable space.