How much grain did you crush before you opened it up to .050?
Less than a pound but more than half a pound...somewhere in there. Recipe had 9# total.
As far as efficiency; I'm using a different lauter tun than before and I'm fly sparging and I haven't done this in 9 years so everything is an unknown. I'd be willing to bet there's a lot more efficiency just in the sparge so I'm gonna keep the crush where it is and see.
I just woke up and happened to pick up my relatively new thermometer (used for exactly two brews)...the damn thing reads 80o F when I know the room is at most 70o F. Temperature accuracy fail on my brew? Oh well...the eff. was good, conversion was good and the thing is blowing off this morning so it can't be too bad.