I brewed a scottish ale today...its like my 13th batch all grain... I've got a 10 gallon igloo cooler with a false bottom for a mash tun... (no dip tube tho) ... hit my temp range of 154-156... held for an hour.... fly sparged for about 45 mins... kept 2 inches or more water over the grain bed by laying the tube from my LHT on top of the water... boiled and came out just shy of 5 gallons... was supposed to be 1.050 at 70% but hit 1.049... ive brewed other things at 75% and up... i just don't know what im doing wrong... My local HBS is Grape and Granary in akron... they said there gap on their crusher is .38... could that be it? the only thing I can think of is I quit using distilled water and started getting filtered water from the machine at the grocery store. PLEASE HELP!