Yep, mine has the freewheel and I had the sprocket custom sized to fit it. I had considered getting rid of it, but the tight timeline of the build gave me incentive to give it a chance, lol. I was concerned that the freewheel would have trouble with the Predator, but it hasn't shown any issues thus far.
As a side note, I will note the one downside to this setup is that the valve stem is a bit hard to get at behind the sprocket. However, that would've been a problem as long as I kept the sprocket on this side of the wheel.