I'm not sure how you wanted to utilize that laser to align your enlarger, but looking at the Versalab Parallel tool, it is designed to check the alignment with very high accuracy, and the projector box appears a high precision device. Never used myself, but from instructions and given accuracy level, the Bosch GPL 3 won't even come close.

Than again, where is the accuracy limit when it comes to enlarger alignment vs. visible difference on the print?