I'm very cheap. I've been repitching/reusing my yeast and have been very successful with it. However, I feel like I'm still unsure of the correct science of what I've been doing. I am wondering if anyone has any good resources for more advanced yeast techniques, such as banking, culturing, etc. I'd really like to expand the yeasts I use in my regular brewing but when I use repitching techniques I have a very small window of time from one batch to another and don't brew frequently enough to keep 10 different yeast varieties.