Hi Coby,
If you see the mirrors that are on little stands in these pics, at a health & beauty aids store near me (Harmons), they had those mirrors for 8.99 a piece. They are GREAT!!. They are normal mirrors on one side and if you flip them 3X on the other. Most importantly, they swivel so you adjust the angle with no effort. I will be purchasing 2 more this Saturday before I shoot again so my "square will be very uniform. With 4 mirrors at exactly the same height, it should be good. I also tried putting olive oil in a glass and shooting. Turned out to be not very good. I will post a pic tonight, but it made the spot where the lasers hit the oil too bright. I also wanted to purchase glycerine to shoot through, but I went to 3 stores and nobdy sells it, hence I shot through my lava lamp, to nice results. Have a good one!