Hello All,

I've noticed that some ARFs use some kind (cardboard...) wingtube sleeve in the wings and some simply slide into the wing without the sleeve, i.e. into holes in the ribs that are reinforced by plywood. What's everyone's thoughts on this? I've flown a few different planes with cardboard sleeves, but never without. Just curious as to people's experiences with this kind of setup.
Thanks,
JimmyP