Finally got a chance to see my local sheet metal bloke, so got him to bend some pieces - the elevator spar, trim tab spar, and the trim tab itself.  He did a superb job on the trim tab - bent it up from one piece of 0.016" with 3 bends.  Note that the trim tab assembly on this 701 is based on the 750 style - full port elevator span, inset into the trailing edge.  (I believe the 701 tab is a flat plate hinged to the existing soft-riveted TE - correct me if I'm wrong!)  Anyway, as I've said on other posts, I think the 750 style trailing edges are far better looking (and easier to make) than the 701 design.

Got into the shed for a few hours last night and did some drilling and clecoing - got the elevator skeleton mostly clecoed together.  The trim tab looks good sitting in the skeleton, just got to find a supplier of piano hinges locally that stocks aluminium ones.  (I did order one from Zenith, until they told me that the postage on this $21 item would be $108!!)

I also bought the trim servo/linkage/wires etc, along with the welded hinge pins. 

Quite looking forward to making the skins now and getting it all together!