We would need more info, but if they are suppose to be close together and of course depending on size you can try some video wall mounts, doubles, not sure if they have quads maybe two doubles spaced out a bit. Either make your own main back bracket or use spacers, we have boxes full of extra parts from hang and bang so spacers and stuff is not a prob for us. And you should use a laser. A log or a store any uneven surface will be a bit tricky but it's doable.