im using 2x3 3/16 tubing. cutting it with a h.f. 14" abrasive saw. the issue im getting is im cutting it on its side to get my angles right. with a new disc i can get thru the top flat and sides but the disc dulls out on the bottom flat. i have to let the metal cool and put on new disc. i was using the h.f. discs so i got some 10 dollar ones from dewalt from lowes and exactly the same. i know i should get a netal specific low speed saw with a metal disc but i had these. im cutting 9 joints so i guess i should go ahead and get one but i thought i would ask for help.