I recommend that you do not cover the wings with anything other then Monokote. I know that Monokote has been getting alot of bad press lately, deserved, or otherwise. However, Monokote has stiffniss, which this wing needs desperatly. The one I built for a friend this summer was covered with transparent UltraCote. Although told not to dive the airplane, he did with devistating results. I was informed during the process of building of the weakness of the wing, so I beefed it up! Obviously it didn't help much.

The bare wing lacks torsional ridgidity due to no sheeting used in the wings construction. Therefore the wing's torsional rigidity comes from the covering material. Certainly the transparent Ultracote lacks stiffniss, in my opinion. I have an Airtronics Oly II with no sheeting in the wing; but, covered with transpartent Monokote. This sailplane was built in 1978 and is still going strong.