Thanks for all the thoughts everyone. Feep - drawing looks very similar to what I have sketched out!

Carbon-in-carbon idea hit a snag. All the carbon tubes I saw today appear made accurate OUTSIDE only, so couldn't get a rod to be a consistent sliding fit inside. Makes solving your problem a bit less simple Feep sorry! Instead, I'm going to use ALUMINIUM for the tailplane tube and carbon tube or rod as the joiner/pivot. Now I know why we used to use this on the gliders!

The aluminium isn't carrying much load that way, and I'll still have carbon tube LE & TE's. Iron E's bearing idea has merit too - could even be made scalish, but I'm trying not to get carried away..... Otherwise I've got pretty much all the bits and pieces now, so work will commence pronto. BTW, I build slow so don't hold your breath for the "finished" shots!

Cheers,

Cam