Thank you all for the input.
I will adjust my flame after hot break to the lowest boil and see how it turns out.
Home brewing is a learning experience every time!
I have noticed an increase in evaporation during the cold spell we had in AZ.
I lost over three gallons some in the grains but most in the 60 minute boil. It is something I've never put much thought into. A friend of mine states he boils as low as possible "212 is 212".
I'm sure breweries...
Did you hit your target of 153? you state your mash temp is from "154" to 152. Do you have an insulated Keggle? The drop seems small. I use a cooler and the drop is in that range. Maybe your strike temp is higher than you think. Also, I have adjusted my PH and been able to raise my efficiency.