Is it necessary to qualify a test coupon for semi-automatic GTAW where we have PQR for manual GTAW, all the variables are same except fire feeding controlled by machine??..QW-410.25 say manual or semi-automatic to machine or automatic is not an essential variable, but manual to semi-automatic is not mentioned any where...and do I need to qualify welder for semi-automatic GTAW as manual and semi-automatic GTAW variable for welder is same?