RE: SR Batteries Eindecker Questions...
A word of warning on the staining: Test for the effect first. I experimented with staining the balsa of my EIII's frame (a dark brown) but it looked awful through the yellowish Antique Solartex. It looked mostly gray. And of course it showed up the fat, non-scale width "lumber." In the end, it's probably better to leave the wood unstained and figure out some ways to "highlight" (or fake) scale structure on the surface (for example with light chalk rubbings before clear finishing). I dirtied up the surface of my sides with a thin blackish-brown wash.
Anyway, test first to see if you like what you see.