I sheeted the leading edge of my 4* mainly for the experience partly for the aesthetics. The standard 4 star wing while it seems flimsy "in the bones" once it is covered is extremly strong.

At the stage you are with the build now you would have to trim each of the ribs and this would be difficult to get them all done exactly the same, you would also probably break a few, so I would leave the wings as is.

Nice job on the cowl though.