Well I've had the net in the tank since yesterday, and been directing the food into it. The fish have been going in behind it to pick the food from the back
But today the rcw went in to get get the food, as soon as I went near the tank, he booked it out. I'm going to pick up a bigger net today, but looks like this could work. I'm not going to attempt to catch yet, letting him continue to get comfortable with it.
I've also moved all corals he's been flipping into my other tank for now. Seems like once he's figured out he's moved them, he doesn't leave them alone regardless of what I do.