We have one it has been a nightmare from day! one sent it back 3 times told NFF gave up & bought an Oxford 700 3Phase.
Mate was using for first time on 3mm x 83mm circles had 1\4 sheet with a scrap piece welded to the back in the vice about 2 inches clearance to vice, well lets say it cuts Well.
Every time we used the Lincoln was grief mainly on 3mm mild never finished a job on 6mm tried everything external air new torch bits, even new torch as, well doubt if it has done 3 hours work in total the boys will break out the gas axe before even trying to use it.
Sat there mouldering at present