No other obvious changes in your coffee or workflow? Same issue on both of the machines listed in your profile, or just the Spaz? Is your group clean? Tried a different grinder? Pressure issues with normal readings would be rather unlikely. Might be possible if gauge pressure is measured upstream from a clogged gicleur, if that machine has one. That said, I'm actually surprised that no one has marketed Scaces in smaller sizes. 53 and 49mm baskets are very common.