Yeah. The difficulty is that leverage with ETFs is much more limited and spread is higher. Most ETFs only have a volatility of around 10%, which means I'd have to leverage up at least 2x to hit my volatility target. That would make margin calls a real risk, plus you have to pay interest on the margin loan as well.
I've thought about deep in the money options as another alternative but the spread is high.
This is really just a test run at this point. If it works well I'll scale up the account and will be able to diversify much more broadly.