Hey, you lab wizards out there--give me some advice re: surfacing with wax vs. alloy blocking. We run a small retail lab (lenscrafters-type), and are currently using alloy blocking. My troops are lobbying for switching to wax, I guess 'cuz they're concerned about the lead, and/or they think wax is easier and less messy. I heard it's easier to get lens warpage using wax (we use an Optek SL generator). Any input would be appreciated from the guys in the know. Thanks!