I bought the German Sonnenland mohair top from Classic Alfa and installed it myself. Pretty simple since the rear stud holes are all pre-punched perfectly. I could have done it in a day or two, but after I removed the old top I found the frame kind of rusty so I took some extra time to sand it and paint it with black semi-gloss POR15. I also found 5 of the rear channel studs stripped, rusted or broken so I decided to replace them with metric Rivnuts and studs. What with waiting for the paint on the frame to adequately cure, and sourcing the proper metric rivnuts and install tool, those extra projects added about a month to my install, but the top fit nice and tight and there wasn't a single wrinkle in the rear window. Gadwhite's excellent photo thread on this forum was very helpful and gave me the courage to tackle the job. I'd buy the same top from Classic Alfa if I had to do it again.
'88 Quad - "Claudia"