Only when you set the Margin slider down to 2. With $20 margin you'd still need $2000, no matter the account. It would then just purchase more lots.

If you want to trade only one system, I suggest Z2. It is less profitable than Z1, but has a higher win rate and takes profits faster.

For being 100% on the safe side, you could decide to wait until we opened some micro accounts and tested them over some weeks. Theoretically there shouldn't be a problem, but maybe there's some unknown side effect of a very low margin. We had never run Zorro on a micro lot account so far.