I'm cutting steel floor tiles which are approx an 1/8 in thick. the back is ribbed and the ribs are hollow but over an 1 in thick. I've been using a 4 1/2 in grinder with a cutting wheel to cut the smoothing the edges with a grinding wheel. Can I do it easier, faster and safer with another tool.. also i've started using a 5 in grinder now.. thanks in advance;.. R in the burgh go steelers...