The tank was almost empty when I checked it and it was mixing air during the intake of the pump. I guess it was not a good idea to fill only 1/4 of the tank 
I finished the first side of my first 303 piece and the machine did an amazing job even without the stiffeners The only problem was when I checked the machine in the morning to see the result it asked me to re home the machine while trying the “send to front” button, I’m not sure why but it caused me to lose my origin preventing to drill some anchoring holes and do the finishing passes. So I’m now machining a fixture out of aluminum to finish the reverse side of it. Langmuir still didn’t send me my touch probe which I ordered almost a month ago, would be much easier with that.
