Less risk selling March 17 calls. 1/31, 2/2, 2/7 paid much better. Paid over $.70 three times in the last 2 weeks. Timing is important. You can always roll, all or a portion, if SP is nearing $30 if you are concerned with losing shares.  I would rather sell shorter twice and since the volatility/premiums have increased since Du's decision it's a better option environment. 

If you stick to your April and sell for $1.10 - $1.2 I'm sure you'll find a time in the next 2 months to buy back under $.50-$.60.

Selling calls is a good strategy especially if you're ready to get out at $31+. There are many ways to go about options than simply selling a call and thinking whatever happens happens. You may know all this. 

You could push this out another 6 months and collect another 10%.