Hey guys, I just bought a lot of ten 15mm x 45mm borosilicate glass vials for the purpose of making some torture tubes. I have never done hot work with glass before and was hoping for some pointers. Of course, I will be wearing goggles and long sleeves before I proceed. I know the COE of borosilicate is lower than regular glass but how apt is this glass to shatter? Does borosilicate require a slow cool-down when done? MAPP vs. Propane? Good prodding and shaping tools? Any other pointers would be welcomed. I am hoping to get some nice dimple tubes produced along with some nice twisted tubes. If successful, I may be open to making more and selling them here to interested lumia DIY'ers. Thanks in advance!