hey I have a lincon sp 125
hey I have a Lincoln its the best thing ever ! I weld with flux core for everything works great sheet metal to 1/2 no prob Iv had it for 15 years love it as for boxing the frame do it from front to back I did my 57 chevy truck frame in 2 foot chunks 1/8 for most 3/16 for the motor mounts and Don't put brake lines in the box at all Bad Bad idea !! good luck!!