Couple questions, Jared (First off, very excited to give this a try!). Are the Silica Flour 325 mesh and the Fused Silica Flour on the resources list for the face coat slurry interchangeable? Do you have any recommendations for getting ahold of these silica flours at a reasonable price? I live in rural northern Wyoming. No foundry supply places around me that I know of. Closest may be Salt Lake (8hr drive)? Might just have to man up and pick some up next time I'm traveling, unless I can find an economical way to get it shipped? Also, any alternate options for some of these other specialty products like the Laguna Gum Solution? Most these products cost more to ship than the product itself. Something like this from amazon would ship free if a suitable substitute? https://www.amazon.com/AMACO-41371N-1-Pint-Gum-Solution/dp/B0044SBAL2 One more question for now (I'm sure I'll have more later). How long do you typically expect a batch of slurry to last before it goes bad? Are we talking days, months, years? Thanks in advance!