On an hp3655 Boss laser, what settings of speed, power, oxygen and shop air gives the best output on 16gauge metal. Ive cut bigger signs and had no problem but i tried cutting .5inch size letters and it gets to hot and ends up blowing out the metal. I went up to 1.5inch letters and it would do fine until it got to a turn or ran beside the other cut like on a W and it would distort the cut. My O2 is set about 75psi and compressor is at 60psi with 6 speed and 95 power. Any help would be awesome.