I have a Ezrouter 4x4 apc . Couuting .125 material is no problem I'm trying to set up to cut .187 mat. with a Miller Spectrum 375 torch . Its not cutting completely through the mat. in spots and where it does it leaves alot of slag ,anyone have any sugestions on this: what amps, tip volts feed speed ,etc. I should use I have went by whats in the owners manual but thats not working. Thanks.