I'm hoping that was a joke.
The Mach1 was built around 120W of load using r134a. The Mach2 moved to r404a and shows a lower temperature up to 120W. The GT added a nice screen and some looks to it, and supposedly expanded the load range to 150W, but I've never seen one make it past 130W.
To have the unit work properly your going to end up having it stripped and rebuilt with a larger condenser and a proper flexible line and evaporator with metering device. If you still can, return the Mach1 and contact your closest custom phase builder to get a unit that will hold your load properly.