Rebuilding the mash tun; the valve on it was crappy plastic, bulkhead was too loose, and my false bottom (on 3" legs) is what I think may have been contributing to less than optimum efficiency. Bought a new 12" domed false bottom this week, and stopped at HD on the way home today to get the hardware. Replaced the 3/4" bulkhead with a 1/2", and a solid brass ball valve to replace the crappy plastic one; but bought the wrong size MIP to barb fitting for the hose from the bottom to the bulkhead. No matter, will get another one tomorrow after brewday; I'll just tip the tun up when it's time to drain as I've done in the past. Now my bag will go all the way to the bottom of the tun, I'm losing that 3" of dead space that I'm about 98% positive kept my efficiency down. Or that's what I'm telling myself. It's also fun to build things; doing a leak test now, and it's got just a tiny one that will go away once it gets gummed up with wort. I'll provide pics when it's all done. Gonna be a double brew weekend, doing a WF lager tomorrow and some IPA on Sunday. For anyone who hasn't seen my setup before, my mash tun is a repurposed 16g blue extract barrel with a sparge arm built into the lid, wrapped in two layers of thermowrap; love that thing. I can do 10g batches in it, just choose not to, because hefting that much wet spent grain is just a bit too much. And I like variety.