I've had my Bok head sitting in vinegar overnight to clean it up so I can have another crack at soldering it tomorrow...
Today I bought a few stainless scrubbers and a big bag of Scoria from the hardware, with any luck I can do a nice spirit run of my neutral tomorrow night. If not, my cornflakes whiskey has finished fermenting and I think I might have to strip that and start gen 2 this weekend :)