Hi Styria,
I put the frame back in to the white 350SE about 2 weeks before I left, which would have been start of September. Also repeated the procedure entirely (remove sunroof and frame, de-rust, clean, un-jam, grease, replace worn parts, replace everything) on the blue 6.9, which took 2 concurrent weekends I think.
Note though that I didn't re-paint the whole frame, just the rusted corners / edges. Would have liked to have re-painted completely, but too many corners and ribbed surfaces, and not enough tools or patience either. Maybe one day.
Agree with BAR about alternte sources for some of the perishable parts - the sunroof brushes in particular (which you can't get from Autohaus AZ) were something like $35 per side, but possibly some slinding aluminium window brushes from your local window shop could be substituted.
Lukas