I just purchase the straight IPT60M torch for my cnc table with my Everlast 60s cutter. I like to be able to cut some small letters and numbers out of thin metal. I can turn the cutter down to 20 amps. Can I change the tips to narrow the kerf? If so, whats the smallest I can get? Is my only other option is to purchase a smaller cutter? Any help would be appreciated .