GRR!

The only change I made this time was that I bumped up the temperature from 1018 to 1030 (for the presintering step) and from 1074 to 1100 (for the sintering step). Was hoping this would counteract the extra insulation a bit. No dice.

I am a bit apprehensive to just increase the temperature even more --- see the melting in the I beam? That can't be good! But I'm not really sure what else to do otherwise. Still no oxidation, which is good, but my parts aren't solid! The cube is even worse than before, even. 

maybe I can extend the ramping time from presintering to sintering temperature? Like for 4 hours instead of 2.5 hours?