My Omega D2 is wall mounted and I would love to purchase a Versalab Parallel in order to align it. I've tried bubble levels, film etching, zip-a-tone and window screen. Unfortunately, I do not have the $150 to $190 for one.. Has anyone tried using one of those laser plumb bobs and a mirror (possibly a front surface mirror) as a cheaper replacement? I just won the bid on one that looks amazingly similar to a Versalab Parallel for $13 shipped. Either way i'll let y'all know how it works out.