Are there tumblers guaranteed between deposits and withdrawals or are one user's deposits sometimes passed directly to another user's withdrawal without a tumbler in between? If someone made a deposit of exactly 0.001, 0.002, 0.004, could those be passed on without tumbling?
I'm quite certain that tumblers are guaranteed between deposits/withdraws because it would needless complicate things and create various issues to only gain back a tiny transaction fee. For example,
here's an 8 mBTC deposit that was used to create 4.096
BTC chips, rather then being put into the chip pool as an 8 mBTC chip.