BearCatPilot:

On the Sig 1/6 Cub the midstrut braces are purely decorative, to make the plane more scale. Yes, you can leave them off.

They're attached with little strips of 'glass and resin, or that's the way I did it on my last one. I made sure they would fold down against the struts.

With the struts hinged at their attachment point on the wing, I could unfasten them at the rear gear leg, then when the wing was off I folded the mid strut braces against the struts, and folded the struts against the wing.

Handy for assembly, yet out of the way for transport.

Bill.