I think we need to note the difference between a tool like Versalab (laser specs aside) and just another laser level. Versalab, as I understand it, projects laser beam up and will show a reflection on its surface, away from projecting hole, indicating out of parallel planes. A laser level does not really have the "landing" area and will need to be modified so you can reliably see the off axis issues. For accuracy sake that plane needs to be perpendicular to the laser beam. Can be done, but as I noted earlier, cheaper laser levels have ugly beam characteristics and getting a good one is not going to save anyone any money, not even a used (unless it's part of a divorce settlement).