I have a Milwaukee 14" abrasive chop saw that I will still used for most cutout. However, adjusting it for doing 45s and other angles has always been a pain in the sciatic nerve. When I needed a couple little gussets, it was hardly worth the trouble, and resetting it back to ninety degrees exact gets to that same nerve. So, I would nearly always use an angle grinder with a .045" cutoff wheel to do things like that. Now, after the ease of cutting those long tapers from the channel iron, I know that steel-cutting blade will be the weapon of choice.