I am getting ready to do my first 10 gallon batch. In order to get my volumes I need for sparging ( limited space in the HLT) I will have to up my normal water to grain ratio from 1.25 qts per lb to 1.5 qts per lb..... will this have any effect on efficiency numbers......Also I usually boil off 1.5 gallons in an hour boil for a 5 gallon batch...will the extra volume change that?