Come 1 Sept a Savings Pot will be created with UP TO R30 000 from 10% of your current fund value, aka seed capital for the Savings Pot, the rest of current fund value will go into a Vested Pot.
So the max you will be able to withdraw come Sept is R30 000 or less, then as time passes, 33.33% of future (post 1 Sept) contributions will go into this Savings Pot, so it will take a while to build a significant amount.
Only 1 withdrawal a tax year (do not know if this is across all funds if you have more than 1). Withdrawals will be taxed at your income tax percentage.