May I ask how you did the non-sunroof conversion. Possible future project of my own.

I used a donor car and welded the roof to the factory weld points on my car. If welded correctly, is just as strong as the factory roof. You can just patch the sunroof but on the inside it still looks strange because of the different reinforcement implemented on sunroof cars 

If you would like, I can take some detailed pictures of the weld points