I have finally assembled, glued and tested the Angel Wings for my 56" Macomber. There's still some sanding and finishing, but I figured that if major changes were needed after testing then it would be silly to have them looking perfect, but not working!! I wound on a 9 tea-towel cotton warp without problems which was pleasant after some major tangles on a similar project last year! The wood is Oak and I have poplar dowels.
The inserted piece hooks into the back cast metal strut and is then locked in by a screw on the castle. I'll probably make that a slot so that it just drops into place. There are three holes to give options in positioning the cross between castle and the back beam.