Damn that's a nice and simple setup. If I'm reading it right, you heat your strike water in the kettle, then pump it up into the mash tun, when mash is complete it drains back into the kettle, use the pump again to vorlauf, then sparge to collect your target volume before the boil?
I'm a BIAB guy but I've been wanting to put together a mash tun like yours so I can vorlauf for clearer wort. I didn't realize you could do it without a third vessel. Thanks for sharing!