Thanks guys. Yeah, I realize it is a similar concept as BIAB, and can be identical. If not using the bag, you're relying on a false bottom, which is not as fine as a bag. That's why I wasn't sure about mill gap. My mill is currently set up at .030, and always thought you needed to be around .040 for lautering and sparging.
I like the idea of heating all the water, and reserving your sparge water.
I got the 65L unit, so I'll be doing larger batches, as well as high gravity batches, so I'm looking forward to sparging. I never messed with sparging while brewing BIAB, as it was just a mess. And I kinda like the idea of not having to squeeze the dickens out of a bag either.
I believe the Gen 4 Brewzilla malt pipe has perforations on the side now also, so the recirculation issue outside of the malt pipe shouldn't be an issue (hopefully).