I have a Sigma wet saw that I like (mainly because it is light and dead accurate), but I'm having trouble finding blades in the old city of Toronto area. The original equipment blades from sigmq run between 100 and 200 a crack and frankly, are not as good as a perl abrasives blade that was rebored to fit the metric arbor. Domus sold me a blade that they said was good ($40)but it didn't run true, and chewed up the one marble tile I attempted to cut. Any ideas? Thanks, Susan