Very nice work! I'm just a little behind you on my 70RR conv restoration. I'm working the inner windshield trim. I posted this in the resto forum but since it looks like you just tackled this...

Basic question is how the upper inner portion of the plastic pillar molding is fastened. There is a hole in the corner piece which lines up with the screw hole in the plastic piece, but no corresponding hole in the pillar itself.