major tool stickage using the 3 micron. it scratched the mirror. i had to go back to 1000. found out the tiles wore down and their were no gaps between the tiles. i hacksawed the epoxy. back in busness. almost done with focalstat tester, i have to make the light housing. it looks like ill be softening pitch. the stuff i got crumbles. would colored beeswax work? stan