crazy cheap tig

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=91811

ive heard there is a hack to add a foot pedal, and ive got a 20% off coupon, so i could get it for 160.

is there any reason i couldent get good welds lets say if i wanted to make aluminium intake manifolds and stainless headers?

my work bought that unit as a temporary replacment while the syncrowave was getting repiared and it really did a bad job, duty cycle wasnt long enough to do a good weld even on thin material it would shut down