Hey guys, so have (had) in my exhaust hole grating. Pretty tough the material, whatever it might be, stainless steel probably. Drilling holes had in the beginning 4 or 4.5 he diameters. Then, because the sense behind lattice in the exhaust did not open up to me, first drilled on 5, then on 6 and then with a seperate step cut through the bridges and have only a small edge stand. Had the material presented to me less unruly, but with dremel and corund attachment I WANT to the rest of the back, but in vain. Someone have an idea what to look for in the exhaust ? Just optical thing maybe ?? Or an idea what to do with the rest. Does a tungsten carbide cutter help there perhaps ? Mfg