Just for fun I tried the system out with the very cheap line lasers you can get on Amazon and ebay for £3. These don't use a glass cylindrical lens, rather a plastic ridged grating with multiple ridges. Although the software was able to get a solid lock on the beam I personally wouldn't trust this, the lens seems to create multiple lines that when focused land on top of each other, giving us multiple guassians. The depth of focus is also not good. See the pictures:

Click image for larger version.  Name: cheap_laser.jpg  Views: 1004  Size: 93.3 KB  ID: 26340
Click image for larger version.  Name: diffraction_laser.png  Views: 1091  Size: 340.9 KB  ID: 26341