Lost ground has been recouped and more now.
Strut length has been adjusted here and there, after rigging was in place. The outer bay landing wires are functional. They are deliberately short, and pull the wing structure up and level. This will be repeated with the final bay. I have left this off for now, because I need to dope out the aileron arrangement. A fellow over on Britmodeller, one Matti64, was kind enough to send some good Curtiss drawings that are a godsend for that.
Once the rigging was done, I could do the tubular arrangements in the center section.
This is 0.6mm rod, and matches up with existing pieces. The triangle is got by bending ends of two lengths of rod. I had previously cut a little length of rod that matched the width separating the verticals. I placed this 'gauge' on some two-sided tape, and then stuck bent rod stuck down on the tape till I had the triangle right in relation to this standard width. Then a crosspiece could be trimmed to fit. A dab of CA gel on joints, and then douse things in accelerator. This, I found by happy accident long ago (I swear I've spilt more of this stuff than I've actually used), obliterates the tack of any tape quickly. So the assembled piece can just be lifted up and rinsed for use.
The lower portion of one of the rear supports is a bit askew. I will leave it for now, but will think again when assembling the tail. That's a bit down the road --- 'cockpit' arrangements, controls and such, ailerons, radiators, and forward stabilizer arrangements are the order of the day.
Rigging is slowly coming back to me. Got my failure rate down to about one in four from four in five. Once all the lines were in, I trimmed down the struts a bit by scraping with a blade's edge. With color on they look all right to me.