Our 110v 140 Mig is a very efficient unit i can run our model where with a lincoln migpack will throw the breaker . I know this because i have done it. And the migpack is lower top end and less duty cycle. The I-Mig 140 is 35% duty cycle .
There are a few Body Shops in the GTA area that are purchasing this unit and the Rep selling them is demoing using Aluminum through the Mig Gun to show how effective it is.

We have had this model in Stock here in Canada for the last couple of months.