New seal for sunroof

[pmcinema]

So, I am 98.5% complete on restoring my '91 318is. Got the car back from the paint shop and noticed that due to the wet sanding and so forth, the sunroof seal is shot. I have been using cars at the junk yards as tests and found that I can take off the seal without removing the sunroof itself. Putting on a new one is a different story I think. Has anyone replaced the seal and does the whole sunroof system have to be taken apart? Any words of advice.........Thanks