Originally Posted by wilserbrewer

1. IMO it is not necesary to mash out
2. The time b/w first runnings and sparging is a concern if your runnings sit and the temp drops and enzyme activity continues. Again IMO if one were to batch sparge w/o a mashout, runnings should hit the kettle w/ a light flame to increase heat and stop conversion.

What you are proposing is fine, but you may want to compensate by heating your first runnings immediatly, thereby "mashing out" in the kettle ....sort of???

The extended time is not that big a deal...mashing times are not that exact...at 60 minutes drain your first batch sparge and add hot sparge water to end the mash....so whats that ... 65 min mash. RDWHAHB