I'm not looking to max out efficiency to the greatest extent possible. I'm really not that worried about it. I do think the efficiency will get better though because right now, after all the other freakin' over-the-top stuff I did on the rig, I have a freakin' tin pan with a dozen holes popped in it as my "sparge arm"... it just sits on top of the mash so my recirculation doesn't drill a hole straight through the whole grain bed.
Plus I have a high-torque, low-RPM motor that I want to mount for a motorized grain rake.
Either way... the contraption is officially up and running the way it's supposed to run.
An unhealthy amount of beer will now be made....