Gluing in the vertical stab couldn't be easier. In fact, they use a really neat hinge that once installed, will tear the balsa before it comes out, (see pic). I used 2 hour epoxy and glued it in place. Check the alignment and use masking tape if necessary to hold it straight while the glue sets up a dries. Mine went in perfect.

Oh yeah... If you coat the hinge (shown on the bottom) with vasoline before gluing, it will keep the epoxy out of the hinge gaps. When the glue drys, wipe it off and you have a clean hinge that moves freely. (Thanks IMAC guys for that tip)

(more tonight)