On the left of the pic you will notice a laser level, guys, I must tell you this is the neatest toy I have ever had for building big models, it transmits a bright horiizontal and vertical line, I jig the bird up and you can "shoot" in all your frames stringers, wing incidences, tail planes are a cinch, you can be sure the rudder and elevators are in perfect alignment, I set it up in front of the bird and line up all my motor mounts , the good ones . with the tripod stand sell for less than $100, Mike