I fly sparge and I'm getting only 50-60% effic! My crush is from a local brewery, stainless steel false bottom in a converted keg, sparging with 180 deg water for 45 min or so. I tried stirring the mash right before sparging but it didn't help. I need to try a mash out- that may help. Also...
So how close did your brew turn out to the original? How did the color turn out? (looks like the SRM in your post may be a bit low, but I can't figure out how to bump it up while staying in line with the Excel file...)