Built up wing is likely to fly better, although a sheet wing will fly fine if it's big enough and flat enough.

I'd not seen the zinger before either ... but I agree with Kelvin ... looks great. The Sig 1/2 A Skyray flies great too, and it's a sheet wing. As a trainer, I've heard somebody mention, it can use a little reinforcement at the gap between the nose blocks and the leading edge. It can be built in a couple of days.

Either way, with a good running motor and the right prop, you'll do fine. Good luck,

Phil