Congrats OP! Being able to bun again is a beautiful thing
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I'm natural SL and I bun immediately after DCing, while the hair's still soaking wet. I wring out as much water as I can with my hands (anything else causes my shrinkage to start), put it into a ponytail, and bun it from there. After the initial day, I can take the hair out of the ponytail and moisturize it, and the hair's stretched enough that I can re-bun it without completely re-wetting.