We have, so I've been told model 2 wings. It has an aluminum inner spar piece. The weird thing is you can only see the vertical web, not the horizontal pieces of the I beam. There is also some type of epoxy that appears to be covering up the horizontal pieces of the I beam all the way down the wing. Has anyone ever seen this before?
Someone else can confirm, but I think at one time there were spars that had the web directly integrated into the spar... as in they were all one piece, not slid in.